--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui3.0.0/examples/event/event-focus-blur.html Mon Nov 23 15:14:29 2009 +0100
@@ -0,0 +1,1144 @@
+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+ <title>YUI Library Examples: Event: Skinning via Progressive Enhancement using the Event Utility and the Loader</title>
+ <meta http-equiv="content-type" content="text/html; charset=utf-8">
+ <link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
+
+<style>
+ /*Supplemental CSS for the YUI distribution*/
+ #custom-doc { width: 95%; min-width: 950px; }
+ #pagetitle {background-image: url(../../assets/bg_hd.gif);}
+/* #pagetitle h1 {background-image: url(../../assets/title_h_bg.gif);}*/
+</style>
+
+<link rel="stylesheet" type="text/css" href="../../assets/dpSyntaxHighlighter.css">
+<link type="text/css" rel="stylesheet" href="../../build/cssfonts/fonts-min.css" />
+<script type="text/javascript" src="../../build/yui/yui-min.js"></script>
+<style type="text/css">
+
+ .yui-checkboxes-loading #checkboxes {
+ display: none;
+ }
+
+</style>
+
+<script type="text/javascript">
+
+ // Hide the checkboxes if JavaScript is enabled to prevent
+ // the user from seeing a flash of unstyled content while
+ // the JavaScript for the checkboxes is being loaded.
+ document.documentElement.className = "yui-checkboxes-loading";
+
+</script>
+</head>
+<body id="yahoo-com" class=" yui-skin-sam">
+<div id="custom-doc" class="yui-t2">
+<div id="hd">
+ <div id="ygunav">
+ <p>
+ <em>
+ <a href="http://developer.yahoo.com/yui/3/">YUI 3.x Home</a> <i> - </i>
+ </em>
+ </p>
+ <form action="http://search.yahoo.com/search" id="sitesearchform">
+ <input name="vs" type="hidden" value="developer.yahoo.com">
+ <input name="vs" type="hidden" value="yuiblog.com">
+ <div id="sitesearch">
+ <label for="searchinput">Site Search (YDN & YUIBlog): </label>
+ <input type="text" id="searchinput" name="p">
+ <input type="submit" value="Search" id="searchsubmit" class="ygbt">
+ </div>
+ </form>
+ </div>
+ <div id="ygma"><a href="../../"><img src="../../assets/logo.gif" border="0" width="200" height="93"></a></div>
+ <div id="pagetitle"><h1>YUI Library Examples: Event: Skinning via Progressive Enhancement using the Event Utility and the Loader</h1></div>
+</div>
+<div id="bd">
+
+
+ <div id="yui-main">
+ <div class="yui-b">
+ <div class="yui-ge">
+ <div class="yui-u first example" id="main">
+
+ <h2>Event: Skinning via Progressive Enhancement using the Event Utility and the Loader</h2>
+
+ <div id="example" class="promo">
+ <div class="example-intro">
+ <p>
+Using Progressive Enhancement to skin checkboxes with the help of the
+<a href="../../api/Loader.html">Loader</a>,
+<a href="../../api/module_classnamemanager.html">ClassNameManager Utility</a>,
+and the Event Utility's <code>focus</code> and <code>blur</code> events and the
+<code>delegate</code> method.
+</p> </div>
+
+ <div class="module example-container ">
+ <div class="hd exampleHd">
+ <p class="newWindowButton yui-skin-sam">
+ <a href="event-focus-blur_clean.html" target="_blank">View example in new window.</a>
+ </p>
+ </div> <div id="example-canvas" class="bd">
+
+
+ <!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
+
+ <div id="checkboxes">
+ <div>
+ <label for="field-1">Field 1: </label>
+ <span>
+ <span>
+ <input type="checkbox" id="field-1" name="field-1" value="1">
+ </span>
+ </span>
+ </div>
+ <div>
+ <label for="field-2">Field 2: </label>
+ <span>
+ <span>
+ <input type="checkbox" id="field-2" name="field-2" value="2">
+ </span>
+ </span>
+ </div>
+ <div>
+ <label for="field-3">Field 3: </label>
+ <span>
+ <span>
+ <input type="checkbox" id="field-3" name="field-3" value="3">
+ </span>
+ </span>
+ </div>
+</div>
+
+<script type="text/javascript">
+
+ YUI({
+
+ base: "../../build/",
+
+ // Load the stylesheet for the skinned checkboxes via JavaScript,
+ // since without JavaScript skinning of the checkboxes wouldn't
+ // be possible.
+
+ modules: {
+
+ "checkboxcss": {
+ type: "css",
+ fullpath: "assets/checkbox.css"
+ },
+
+ "checkboxjs": {
+ type: "js",
+ fullpath: "assets/checkbox.js",
+ requires: ["classnamemanager", "event-focus", "node-event-delegate", "checkboxcss"]
+ }
+
+ }
+
+ }).use("checkboxjs", function(Y, result) {
+
+ // The callback supplied to use() will be executed regardless of
+ // whether the operation was successful or not. The second parameter
+ // is a result object that has the status of the operation. We can
+ // use this to try to recover from failures or timeouts.
+
+ if (!result.success) {
+
+ Y.log("Load failure: " + result.msg, "warn", "Example");
+
+ // Show the checkboxes if the loader failed that way the original
+ // unskinned checkboxes will be visible so that the user can
+ // interact with them either way.
+
+ document.documentElement.className = "";
+
+ }
+
+ });
+
+</script>
+
+ <!--END SOURCE CODE FOR EXAMPLE =============================== -->
+
+
+ </div>
+ </div>
+ </div>
+
+ <h3>Challenges</h3>
+<p>
+There are a few challenges when trying to skin an HTML checkbox using CSS. To start, most of the
+<a href="http://developer.yahoo.com/yui/articles/gbs/#a-grade">A-grade browsers</a> don't provide
+support for CSS properties like <code>border</code> and <code>background</code> on the
+<code><input type="checkbox"></code> element. Additionally, IE 6 and IE 7 (Quirks Mode)
+lack support for attribute selectors — necessary to style the <code>checked</code> and
+<code>disabled</code> states. Additionally, IE 6 and 7 only support the <code>:focus</code> and
+<code>:active</code> pseudo classes on <code><a></code> elements, both of which are needed
+to style a checkbox when it is focused or depressed.
+</p>
+
+<h3>Approach</h3>
+<p>
+Despite the shortcomings in CSS support, with a little extra markup and through the use of
+JavaScript it is possible to skin an <code><input type="checkbox"></code> element
+consistently well in all of the
+<a href="http://developer.yahoo.com/yui/articles/gbs/#a-grade">A-grade browsers</a>.
+</p>
+
+
+<h4>Markup</h4>
+<p>
+Since CSS support for the <code><input type="checkbox"></code> element is lacking, wrap
+<code><input type="checkbox"></code> elements in one or more inline elements to provide the
+necessary hooks for styling. In this example, each <code><input type="checkbox"></code>
+element is wrapped by two <code><span></code>s.
+</p>
+
+<div id="syntax1" class="yui-syntax-highlight"><div class="numbers"><pre class="html4strict" style="font-family:monospace;"><ol><li class="li1"><div class="de1"><span class="sc2"><<span class="kw2">span</span>></span></div></li><li class="li1"><div class="de1"> <span class="sc2"><<span class="kw2">span</span>></span></div></li><li class="li1"><div class="de1"> <span class="sc2"><<span class="kw2">input</span> <span class="kw3">type</span><span class="sy0">=</span><span class="st0">"checkbox"</span>></span></div></li><li class="li1"><div class="de1"> <span class="sc2"><<span class="sy0">/</span><span class="kw2">span</span>></span></div></li><li class="li2"><div class="de2"><span class="sc2"><<span class="sy0">/</span><span class="kw2">span</span>></span></div></li></ol></pre></div><div class="nonumbers"><pre class="html4strict" style="font-family:monospace;"><span class="sc2"><<span class="kw2">span</span>></span>
+ <span class="sc2"><<span class="kw2">span</span>></span>
+ <span class="sc2"><<span class="kw2">input</span> <span class="kw3">type</span><span class="sy0">=</span><span class="st0">"checkbox"</span>></span>
+ <span class="sc2"><<span class="sy0">/</span><span class="kw2">span</span>></span>
+<span class="sc2"><<span class="sy0">/</span><span class="kw2">span</span>></span></pre></div><textarea id="syntax1-plain"><span>
+ <span>
+ <input type="checkbox">
+ </span>
+</span></textarea></div>
+<h4>CSS</h4>
+<p>
+To style each checkbox, a class name of <code>yui-checkbox</code> will be applied to the
+outtermost <code><span></code> wrapping each <code><input type="checkbox"></code>
+element. An additional class will be used to represent the various states of each checkbox. The
+class name for each state will follow a consistent pattern: <code>yui-checkbox-[state]</code>.
+For this example, the following state-based class names will be used:
+</p>
+<dl>
+ <dt><code>yui-checkbox-focus</code></dt>
+ <dd>The checkbox has focus</dd>
+ <dt><code>yui-checkbox-active</code></dt>
+ <dd>The checkbox is active (pressed)</dd>
+ <dt><code>yui-checkbox-checked</code></dt>
+ <dd>The checkbox is checked</dd>
+</dl>
+<p>
+The styles for each checkbox comes together as follows:
+</p>
+
+<div id="syntax2" class="yui-syntax-highlight"><div class="numbers"><pre class="css" style="font-family:monospace;"><ol><li class="li1"><div class="de1"><span class="re1">.yui-checkbox</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> <span class="kw1">display</span><span class="sy0">:</span> -moz-inline-stack<span class="sy0">;</span> <span class="coMULTI">/* Gecko < 1.9, since it doesn't support "inline-block" */</span></div></li><li class="li1"><div class="de1"> <span class="kw1">display</span><span class="sy0">:</span> inline-<span class="kw2">block</span><span class="sy0">;</span> <span class="coMULTI">/* IE, Opera and Webkit, and Gecko 1.9 */</span></div></li><li class="li1"><div class="de1"> <span class="kw1">width</span><span class="sy0">:</span> <span class="re3">10px</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> <span class="kw1">height</span><span class="sy0">:</span> <span class="re3">10px</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">border</span><span class="sy0">:</span> <span class="kw2">inset</span> <span class="re3">2px</span> <span class="re0">#999</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#fff</span><span class="sy0">;</span> <span class="coMULTI">/* Need to set a background color or IE won't get mouse events */</span> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="coMULTI">/*</span></div></li><li class="li2"><div class="de2"><span class="coMULTI"> Necessary for IE 6 (Quirks and Standards Mode) and IE 7 (Quirks Mode), since </span></div></li><li class="li1"><div class="de1"><span class="coMULTI"> they don't support use of negative margins without relative positioning. </span></div></li><li class="li1"><div class="de1"><span class="coMULTI"> */</span></div></li><li class="li1"><div class="de1"> _position<span class="sy0">:</span> <span class="kw2">relative</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox</span> span <span class="br0">{</span></div></li><li class="li1"><div class="de1"> <span class="kw1">display</span><span class="sy0">:</span> <span class="kw2">block</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">height</span><span class="sy0">:</span> <span class="re3">14px</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">width</span><span class="sy0">:</span> <span class="re3">12px</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> <span class="kw1">overflow</span><span class="sy0">:</span> <span class="kw2">hidden</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="coMULTI">/* Position the checkmark for Gecko, Opera and Webkit and IE 7 (Strict Mode). */</span></div></li><li class="li1"><div class="de1"> <span class="kw1">margin</span><span class="sy0">:</span> <span class="re3">-5px</span> <span class="nu0">0</span> <span class="nu0">0</span> <span class="re3">1px</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="coMULTI">/* Position the checkmark for IE 6 (Strict and Quirks Mode) and IE 7 (Quirks Mode).*/</span></div></li><li class="li1"><div class="de1"> _margin<span class="sy0">:</span> <span class="nu0">0</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> _position<span class="sy0">:</span> <span class="kw2">absolute</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> _top<span class="sy0">:</span> <span class="re3">-5px</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> _left<span class="sy0">:</span> <span class="re3">1px</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="coMULTI">/* For Gecko < 1.9: Positions the checkbox on the same line as its corresponding label. */</span></div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox</span> span<span class="re2">:after </span><span class="br0">{</span></div></li><li class="li2"><div class="de2"> <span class="kw1">content</span><span class="sy0">:</span> <span class="st0">"."</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">visibility</span><span class="sy0">:</span> <span class="kw2">hidden</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">line-height</span><span class="sy0">:</span> <span class="nu0">2</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"><span class="coMULTI">/*</span></div></li><li class="li1"><div class="de1"><span class="coMULTI"> Hide the actual checkbox offscreen so that it is out of view, but still accessible via </span></div></li><li class="li1"><div class="de1"><span class="coMULTI"> the keyboard. </span></div></li><li class="li1"><div class="de1"><span class="coMULTI">*/</span></div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox</span> input <span class="br0">{</span></div></li><li class="li2"><div class="de2"> <span class="kw1">position</span><span class="sy0">:</span> <span class="kw2">absolute</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">left</span><span class="sy0">:</span> <span class="re3">-10000px</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox-focus</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> <span class="kw1">border-color</span><span class="sy0">:</span> <span class="re0">#39f</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#9cf</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox-active</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#ccc</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="re1">.yui-checkbox-checked</span> span <span class="br0">{</span></div></li><li class="li1"><div class="de1"> <span class="coMULTI">/* Draw a custom checkmark for the checked state using a background image. */</span></div></li><li class="li2"><div class="de2"> <span class="kw1">background</span><span class="sy0">:</span> <span class="kw2">url</span><span class="br0">(</span><span class="co2">checkmark.png</span><span class="br0">)</span> <span class="kw2">no-repeat</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"><span class="br0">}</span></div></li></ol></pre></div><div class="nonumbers"><pre class="css" style="font-family:monospace;"><span class="re1">.yui-checkbox</span> <span class="br0">{</span>
+ <span class="kw1">display</span><span class="sy0">:</span> -moz-inline-stack<span class="sy0">;</span> <span class="coMULTI">/* Gecko < 1.9, since it doesn't support "inline-block" */</span>
+ <span class="kw1">display</span><span class="sy0">:</span> inline-<span class="kw2">block</span><span class="sy0">;</span> <span class="coMULTI">/* IE, Opera and Webkit, and Gecko 1.9 */</span>
+ <span class="kw1">width</span><span class="sy0">:</span> <span class="re3">10px</span><span class="sy0">;</span>
+ <span class="kw1">height</span><span class="sy0">:</span> <span class="re3">10px</span><span class="sy0">;</span>
+ <span class="kw1">border</span><span class="sy0">:</span> <span class="kw2">inset</span> <span class="re3">2px</span> <span class="re0">#999</span><span class="sy0">;</span>
+ <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#fff</span><span class="sy0">;</span> <span class="coMULTI">/* Need to set a background color or IE won't get mouse events */</span>
+
+ <span class="coMULTI">/*
+ Necessary for IE 6 (Quirks and Standards Mode) and IE 7 (Quirks Mode), since
+ they don't support use of negative margins without relative positioning.
+ */</span>
+ _position<span class="sy0">:</span> <span class="kw2">relative</span><span class="sy0">;</span>
+<span class="br0">}</span>
+
+<span class="re1">.yui-checkbox</span> span <span class="br0">{</span>
+ <span class="kw1">display</span><span class="sy0">:</span> <span class="kw2">block</span><span class="sy0">;</span>
+ <span class="kw1">height</span><span class="sy0">:</span> <span class="re3">14px</span><span class="sy0">;</span>
+ <span class="kw1">width</span><span class="sy0">:</span> <span class="re3">12px</span><span class="sy0">;</span>
+ <span class="kw1">overflow</span><span class="sy0">:</span> <span class="kw2">hidden</span><span class="sy0">;</span>
+
+ <span class="coMULTI">/* Position the checkmark for Gecko, Opera and Webkit and IE 7 (Strict Mode). */</span>
+ <span class="kw1">margin</span><span class="sy0">:</span> <span class="re3">-5px</span> <span class="nu0">0</span> <span class="nu0">0</span> <span class="re3">1px</span><span class="sy0">;</span>
+
+ <span class="coMULTI">/* Position the checkmark for IE 6 (Strict and Quirks Mode) and IE 7 (Quirks Mode).*/</span>
+ _margin<span class="sy0">:</span> <span class="nu0">0</span><span class="sy0">;</span>
+ _position<span class="sy0">:</span> <span class="kw2">absolute</span><span class="sy0">;</span>
+ _top<span class="sy0">:</span> <span class="re3">-5px</span><span class="sy0">;</span>
+ _left<span class="sy0">:</span> <span class="re3">1px</span><span class="sy0">;</span>
+
+<span class="br0">}</span>
+
+<span class="coMULTI">/* For Gecko < 1.9: Positions the checkbox on the same line as its corresponding label. */</span>
+<span class="re1">.yui-checkbox</span> span<span class="re2">:after </span><span class="br0">{</span>
+ <span class="kw1">content</span><span class="sy0">:</span> <span class="st0">"."</span><span class="sy0">;</span>
+ <span class="kw1">visibility</span><span class="sy0">:</span> <span class="kw2">hidden</span><span class="sy0">;</span>
+ <span class="kw1">line-height</span><span class="sy0">:</span> <span class="nu0">2</span><span class="sy0">;</span>
+<span class="br0">}</span>
+
+<span class="coMULTI">/*
+ Hide the actual checkbox offscreen so that it is out of view, but still accessible via
+ the keyboard.
+*/</span>
+<span class="re1">.yui-checkbox</span> input <span class="br0">{</span>
+ <span class="kw1">position</span><span class="sy0">:</span> <span class="kw2">absolute</span><span class="sy0">;</span>
+ <span class="kw1">left</span><span class="sy0">:</span> <span class="re3">-10000px</span><span class="sy0">;</span>
+<span class="br0">}</span>
+
+<span class="re1">.yui-checkbox-focus</span> <span class="br0">{</span>
+ <span class="kw1">border-color</span><span class="sy0">:</span> <span class="re0">#39f</span><span class="sy0">;</span>
+ <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#9cf</span><span class="sy0">;</span>
+<span class="br0">}</span>
+
+<span class="re1">.yui-checkbox-active</span> <span class="br0">{</span>
+ <span class="kw1">background-color</span><span class="sy0">:</span> <span class="re0">#ccc</span><span class="sy0">;</span>
+<span class="br0">}</span>
+
+<span class="re1">.yui-checkbox-checked</span> span <span class="br0">{</span>
+ <span class="coMULTI">/* Draw a custom checkmark for the checked state using a background image. */</span>
+ <span class="kw1">background</span><span class="sy0">:</span> <span class="kw2">url</span><span class="br0">(</span><span class="co2">checkmark.png</span><span class="br0">)</span> <span class="kw2">no-repeat</span><span class="sy0">;</span>
+<span class="br0">}</span></pre></div><textarea id="syntax2-plain">.yui-checkbox {
+ display: -moz-inline-stack; /* Gecko < 1.9, since it doesn't support "inline-block" */
+ display: inline-block; /* IE, Opera and Webkit, and Gecko 1.9 */
+ width: 10px;
+ height: 10px;
+ border: inset 2px #999;
+ background-color: #fff; /* Need to set a background color or IE won't get mouse events */
+
+ /*
+ Necessary for IE 6 (Quirks and Standards Mode) and IE 7 (Quirks Mode), since
+ they don't support use of negative margins without relative positioning.
+ */
+ _position: relative;
+}
+
+.yui-checkbox span {
+ display: block;
+ height: 14px;
+ width: 12px;
+ overflow: hidden;
+
+ /* Position the checkmark for Gecko, Opera and Webkit and IE 7 (Strict Mode). */
+ margin: -5px 0 0 1px;
+
+ /* Position the checkmark for IE 6 (Strict and Quirks Mode) and IE 7 (Quirks Mode).*/
+ _margin: 0;
+ _position: absolute;
+ _top: -5px;
+ _left: 1px;
+
+}
+
+/* For Gecko < 1.9: Positions the checkbox on the same line as its corresponding label. */
+.yui-checkbox span:after {
+ content: ".";
+ visibility: hidden;
+ line-height: 2;
+}
+
+/*
+ Hide the actual checkbox offscreen so that it is out of view, but still accessible via
+ the keyboard.
+*/
+.yui-checkbox input {
+ position: absolute;
+ left: -10000px;
+}
+
+.yui-checkbox-focus {
+ border-color: #39f;
+ background-color: #9cf;
+}
+
+.yui-checkbox-active {
+ background-color: #ccc;
+}
+
+.yui-checkbox-checked span {
+ /* Draw a custom checkmark for the checked state using a background image. */
+ background: url(checkmark.png) no-repeat;
+}</textarea></div>
+<h4>JavaScript</h4>
+
+<p>
+Application and removal of the state-based class names will be facilitated by JavaScript event
+handlers. Each event handler will track the state of the
+<code><input type="checkbox"></code> element, and apply and remove corresponding
+state-based class names from its outtermost <code><span></code> —
+making it easy to style each state. And since each JavaScript is required for state management,
+the stylesheet for the skinned checkboxes will only be added to the page when JavaScript is
+enabled. This will ensure that each checkbox works correctly with and without JavaScript enabled.
+</p>
+
+<p>
+Since there could easily be many instances of a skinned checkbox on the page, all event
+listeners will be attached to the containing element for all checkboxes. Each listener will
+listen for events as they bubble up from each checkbox. Relying on event bubbling will improve the
+overall performance of the page by reducing the number of event handlers.
+</p>
+
+<p>
+Since the DOM <code>focus</code> and <code>blur</code> events do not bubble, use the Event Utility's
+<a href="../../api/YUI.html#event_focus"><code>focus</code></a> and
+<a href="../../api/YUI.html#event_focus"><code>blur</code></a> custom events, as an alternative to
+attaching discrete focus and blur event handlers to the <code><input type="checkbox"></code>
+element of each skinned checkbox. The
+<a href="../../api/YUI.html#event_focus"><code>focus</code></a> and
+<a href="../../api/YUI.html#event_focus"><code>blur</code></a> custom events leverage
+capture-phase DOM event listeners, making it possible to attach a single focus and blur event
+listener on the containing element of each checkbox — thereby increasing the performance
+of the page. The complete script for the example comes together as follows:
+</p>
+
+<div id="syntax3" class="yui-syntax-highlight"><div class="numbers"><pre class="javascript" style="font-family:monospace;"><ol><li class="li1"><div class="de1">YUI<span class="br0">(</span><span class="br0">)</span>.<span class="kw2">use</span><span class="br0">(</span><span class="st0">"*"</span><span class="sy0">,</span> <span class="kw2">function</span><span class="br0">(</span>Y<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> UA <span class="sy0">=</span> Y.<span class="me1">UA</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> getClassName <span class="sy0">=</span> Y.<span class="me1">ClassNameManager</span>.<span class="me1">getClassName</span><span class="sy0">,</span></div></li><li class="li2"><div class="de2"> sCheckboxFocusClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"focus"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-focus</span></div></li><li class="li1"><div class="de1"> sCheckboxCheckedClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"checked"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-checked</span></div></li><li class="li1"><div class="de1"> sCheckboxActiveClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"active"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-active</span></div></li><li class="li1"><div class="de1"> bKeyListenersInitialized <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> bMouseListenersInitialized <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span></div></li><li class="li2"><div class="de2"> forAttr <span class="sy0">=</span> <span class="br0">(</span>UA.<span class="me1">ie</span> <span class="sy0">&&</span> UA.<span class="me1">ie</span> <span class="sy0"><</span> <span class="nu0">8</span><span class="br0">)</span> <span class="sy0">?</span> <span class="st0">"htmlFor"</span> <span class="sy0">:</span> <span class="st0">"for"</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> bBlockClearActive <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> bBlockBlur <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span> </div></li><li class="li1"><div class="de1"> oActiveCheckbox<span class="sy0">;</span> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> initKeyListeners <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"keydown"</span><span class="sy0">,</span> onCheckboxKeyDown<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"click"</span><span class="sy0">,</span> onCheckboxClick<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"blur"</span><span class="sy0">,</span> onCheckboxBlur<span class="sy0">,</span> <span class="st0">"input[type=checkbox]"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bKeyListenersInitialized <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> initMouseListeners <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mouseover"</span><span class="sy0">,</span> onCheckboxMouseOver<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mouseout"</span><span class="sy0">,</span> onCheckboxMouseOut<span class="sy0">,</span> <span class="st0">".yui-checkbox-active"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">this</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"ownerDocument"</span><span class="br0">)</span>.<span class="me1">on</span><span class="br0">(</span><span class="st0">"mouseup"</span><span class="sy0">,</span> onDocumentMouseUp<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bMouseListenersInitialized <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> getCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>node<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">return</span> <span class="br0">(</span>node.<span class="me1">hasClass</span><span class="br0">(</span><span class="st0">"yui-checkbox"</span><span class="br0">)</span> <span class="sy0">?</span> node <span class="sy0">:</span> node.<span class="me1">ancestor</span><span class="br0">(</span><span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> getCheckboxForLabel <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>label<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> sID <span class="sy0">=</span> label.<span class="me1">getAttribute</span><span class="br0">(</span>forAttr<span class="br0">)</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> oInput<span class="sy0">,</span></div></li><li class="li2"><div class="de2"> oCheckbox<span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>sID<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> oInput <span class="sy0">=</span> Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#"</span> <span class="sy0">+</span> sID<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>oInput<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>oInput<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">return</span> oCheckbox<span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> updateCheckedState <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>input<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>input<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>input.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> oCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxCheckedClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> <span class="kw1">else</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxCheckedClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> setActiveCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>checkbox<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> checkbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> oActiveCheckbox <span class="sy0">=</span> checkbox<span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> clearActiveCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>oActiveCheckbox<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> oActiveCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> oActiveCheckbox <span class="sy0">=</span> <span class="kw2">null</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxMouseOver <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="sy0">,</span> matchedEl<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>oActiveCheckbox <span class="sy0">&&</span> oActiveCheckbox.<span class="me1">compareTo</span><span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> oActiveCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxMouseOut <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw1">this</span>.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw2">var</span> onDocumentMouseUp <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oCheckbox<span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bBlockDocumentMouseUp<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>event.<span class="me1">target</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="br0">(</span>oCheckbox <span class="sy0">&&</span> <span class="sy0">!</span>oCheckbox.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="sy0">||</span> <span class="sy0">!</span>oCheckbox<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxFocus <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Remove the focus style from any checkbox that might still have it</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#checkboxes"</span><span class="br0">)</span>.<span class="me1">one</span><span class="br0">(</span><span class="st0">".yui-checkbox-focus"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw1">if</span> <span class="br0">(</span>oCheckbox<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Defer adding key-related and click event listeners until </span></div></li><li class="li2"><div class="de2"> <span class="co1">// one of the checkboxes is initially focused.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bKeyListenersInitialized<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> initKeyListeners.<span class="me1">call</span><span class="br0">(</span>event.<span class="me1">container</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> oCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxBlur <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw1">if</span> <span class="br0">(</span>bBlockBlur<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> bBlockBlur <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="kw1">return</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bBlockClearActive <span class="sy0">&&</span> oCheckbox.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bBlockClearActive <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxMouseDown <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="co1">// Defer adding mouse-related and click event listeners until </span></div></li><li class="li1"><div class="de1"> <span class="co1">// the user mouses down on one of the checkboxes.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bMouseListenersInitialized<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> initMouseListeners.<span class="me1">call</span><span class="br0">(</span>event.<span class="me1">container</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oCheckbox<span class="sy0">,</span></div></li><li class="li1"><div class="de1"> oInput<span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="kw1">this</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"nodeName"</span><span class="br0">)</span>.<span class="me1">toLowerCase</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0">===</span> <span class="st0">"label"</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// If the target of the event was the checkbox's label element, the</span></div></li><li class="li1"><div class="de1"> <span class="co1">// label will dispatch a click event to the checkbox, meaning the </span></div></li><li class="li2"><div class="de2"> <span class="co1">// "onCheckboxClick" handler will be called twice. For that reason</span></div></li><li class="li1"><div class="de1"> <span class="co1">// it is necessary to block the "onDocumentMouseUp" handler from</span></div></li><li class="li1"><div class="de1"> <span class="co1">// clearing the active state, so that a reference to the active </span></div></li><li class="li1"><div class="de1"> <span class="co1">// checkbox still exists the second time the "onCheckboxClick"</span></div></li><li class="li1"><div class="de1"> <span class="co1">// handler is called.</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// When the user clicks the label instead of the checkbox itself, </span></div></li><li class="li1"><div class="de1"> <span class="co1">// the checkbox will be blurred if it has focus. Since the </span></div></li><li class="li2"><div class="de2"> <span class="co1">// "onCheckboxBlur" handler clears the active state it is </span></div></li><li class="li1"><div class="de1"> <span class="co1">// necessary to block the clearing of the active state when the </span></div></li><li class="li1"><div class="de1"> <span class="co1">// label is clicked instead of the checkbox itself.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bBlockClearActive <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> oCheckbox <span class="sy0">=</span> getCheckboxForLabel<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> <span class="kw1">else</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> oCheckbox <span class="sy0">=</span> <span class="kw1">this</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="co1">// Need to focus the input manually for two reasons:</span></div></li><li class="li1"><div class="de1"> <span class="co1">// 1) Mousing down on a label in Webkit doesn't focus its </span></div></li><li class="li1"><div class="de1"> <span class="co1">// associated checkbox</span></div></li><li class="li1"><div class="de1"> <span class="co1">// 2) By default checkboxes are focused when the user mouses </span></div></li><li class="li1"><div class="de1"> <span class="co1">// down on them. However, since the actually checkbox is </span></div></li><li class="li2"><div class="de2"> <span class="co1">// obscurred by the two span elements that are used to </span></div></li><li class="li1"><div class="de1"> <span class="co1">// style it, the checkbox wont' receive focus as it was </span></div></li><li class="li1"><div class="de1"> <span class="co1">// never the actual target of the mousedown event.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> oInput <span class="sy0">=</span> oCheckbox.<span class="me1">one</span><span class="br0">(</span><span class="st0">"input"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Calling Event.preventDefault won't block the blurring of the </span></div></li><li class="li1"><div class="de1"> <span class="co1">// currently focused element in IE, so we'll use the "bBlockBlur"</span></div></li><li class="li1"><div class="de1"> <span class="co1">// variable to stop the code in the blur event handler </span></div></li><li class="li2"><div class="de2"> <span class="co1">// from executing.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> bBlockBlur <span class="sy0">=</span> <span class="br0">(</span>UA.<span class="me1">ie</span> <span class="sy0">&&</span> oInput.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> oInput.<span class="kw3">focus</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> setActiveCheckbox<span class="br0">(</span>oCheckbox<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Need to call preventDefault because by default mousing down on</span></div></li><li class="li2"><div class="de2"> <span class="co1">// an element will blur the element in the document that currently </span></div></li><li class="li1"><div class="de1"> <span class="co1">// has focus--in this case, the input element that was </span></div></li><li class="li1"><div class="de1"> <span class="co1">// just focused.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> event.<span class="me1">preventDefault</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxClick <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> oInput<span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="kw1">this</span>.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> oInput <span class="sy0">=</span> <span class="kw1">this</span>.<span class="me1">one</span><span class="br0">(</span><span class="st0">"input"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>event.<span class="me1">target</span>.<span class="me1">compareTo</span><span class="br0">(</span>oInput<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// If the click event was fired via the mouse the checked</span></div></li><li class="li2"><div class="de2"> <span class="co1">// state will have to be manually updated since the input </span></div></li><li class="li1"><div class="de1"> <span class="co1">// is hidden offscreen and therefore couldn't be the </span></div></li><li class="li1"><div class="de1"> <span class="co1">// target of the click.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> oInput.<span class="me1">set</span><span class="br0">(</span><span class="st0">"checked"</span><span class="sy0">,</span> <span class="br0">(</span><span class="sy0">!</span>oInput.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> updateCheckedState<span class="br0">(</span>oInput<span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw2">var</span> onCheckboxKeyDown <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Style the checkbox as being active when the user presses the </span></div></li><li class="li1"><div class="de1"> <span class="co1">// space bar</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="kw1">if</span> <span class="br0">(</span>event.<span class="me1">keyCode</span> <span class="sy0">===</span> <span class="nu0">32</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> setActiveCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> Y.<span class="me1">all</span><span class="br0">(</span><span class="st0">"#checkboxes>div>span"</span><span class="br0">)</span>.<span class="me1">addClass</span><span class="br0">(</span><span class="st0">"yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Remove the "yui-checkboxes-loading" class used to hide the </span></div></li><li class="li2"><div class="de2"> <span class="co1">// checkboxes now that the checkboxes have been skinned.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#checkboxes"</span><span class="br0">)</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"ownerDocument"</span><span class="br0">)</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"documentElement"</span><span class="br0">)</span>.<span class="me1">removeClass</span><span class="br0">(</span><span class="st0">"yui-checkboxes-loading"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Add the minimum number of event listeners needed to start, bind the </span></div></li><li class="li2"><div class="de2"> <span class="co1">// rest when needed</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> Y.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mousedown"</span><span class="sy0">,</span> onCheckboxMouseDown<span class="sy0">,</span> <span class="st0">"#checkboxes"</span><span class="sy0">,</span> <span class="st0">".yui-checkbox,label"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> Y.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"focus"</span><span class="sy0">,</span> onCheckboxFocus<span class="sy0">,</span> <span class="st0">"#checkboxes"</span><span class="sy0">,</span> <span class="st0">"input[type=checkbox]"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"><span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span></div></li></ol></pre></div><div class="nonumbers"><pre class="javascript" style="font-family:monospace;">YUI<span class="br0">(</span><span class="br0">)</span>.<span class="kw2">use</span><span class="br0">(</span><span class="st0">"*"</span><span class="sy0">,</span> <span class="kw2">function</span><span class="br0">(</span>Y<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw2">var</span> UA <span class="sy0">=</span> Y.<span class="me1">UA</span><span class="sy0">,</span>
+ getClassName <span class="sy0">=</span> Y.<span class="me1">ClassNameManager</span>.<span class="me1">getClassName</span><span class="sy0">,</span>
+ sCheckboxFocusClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"focus"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-focus</span>
+ sCheckboxCheckedClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"checked"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-checked</span>
+ sCheckboxActiveClass <span class="sy0">=</span> getClassName<span class="br0">(</span><span class="st0">"checkbox"</span><span class="sy0">,</span> <span class="st0">"active"</span><span class="br0">)</span><span class="sy0">,</span> <span class="co1">// Create yui-checkbox-active</span>
+ bKeyListenersInitialized <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span>
+ bMouseListenersInitialized <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span>
+ forAttr <span class="sy0">=</span> <span class="br0">(</span>UA.<span class="me1">ie</span> <span class="sy0">&&</span> UA.<span class="me1">ie</span> <span class="sy0"><</span> <span class="nu0">8</span><span class="br0">)</span> <span class="sy0">?</span> <span class="st0">"htmlFor"</span> <span class="sy0">:</span> <span class="st0">"for"</span><span class="sy0">,</span>
+ bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span>
+ bBlockClearActive <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span>
+ bBlockBlur <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">,</span>
+ oActiveCheckbox<span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> initKeyListeners <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"keydown"</span><span class="sy0">,</span> onCheckboxKeyDown<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"click"</span><span class="sy0">,</span> onCheckboxClick<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"blur"</span><span class="sy0">,</span> onCheckboxBlur<span class="sy0">,</span> <span class="st0">"input[type=checkbox]"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ bKeyListenersInitialized <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> initMouseListeners <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mouseover"</span><span class="sy0">,</span> onCheckboxMouseOver<span class="sy0">,</span> <span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="kw1">this</span>.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mouseout"</span><span class="sy0">,</span> onCheckboxMouseOut<span class="sy0">,</span> <span class="st0">".yui-checkbox-active"</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="kw1">this</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"ownerDocument"</span><span class="br0">)</span>.<span class="me1">on</span><span class="br0">(</span><span class="st0">"mouseup"</span><span class="sy0">,</span> onDocumentMouseUp<span class="br0">)</span><span class="sy0">;</span>
+
+ bMouseListenersInitialized <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> getCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>node<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">return</span> <span class="br0">(</span>node.<span class="me1">hasClass</span><span class="br0">(</span><span class="st0">"yui-checkbox"</span><span class="br0">)</span> <span class="sy0">?</span> node <span class="sy0">:</span> node.<span class="me1">ancestor</span><span class="br0">(</span><span class="st0">".yui-checkbox"</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> getCheckboxForLabel <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>label<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw2">var</span> sID <span class="sy0">=</span> label.<span class="me1">getAttribute</span><span class="br0">(</span>forAttr<span class="br0">)</span><span class="sy0">,</span>
+ oInput<span class="sy0">,</span>
+ oCheckbox<span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>sID<span class="br0">)</span> <span class="br0">{</span>
+
+ oInput <span class="sy0">=</span> Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#"</span> <span class="sy0">+</span> sID<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>oInput<span class="br0">)</span> <span class="br0">{</span>
+ oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>oInput<span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span>
+
+ <span class="kw1">return</span> oCheckbox<span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> updateCheckedState <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>input<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>input<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>input.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
+ oCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxCheckedClass<span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+ <span class="kw1">else</span> <span class="br0">{</span>
+ oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxCheckedClass<span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> setActiveCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>checkbox<span class="br0">)</span> <span class="br0">{</span>
+
+ checkbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span>
+ oActiveCheckbox <span class="sy0">=</span> checkbox<span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> clearActiveCheckbox <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>oActiveCheckbox<span class="br0">)</span> <span class="br0">{</span>
+ oActiveCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span>
+ oActiveCheckbox <span class="sy0">=</span> <span class="kw2">null</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxMouseOver <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="sy0">,</span> matchedEl<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>oActiveCheckbox <span class="sy0">&&</span> oActiveCheckbox.<span class="me1">compareTo</span><span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
+ oActiveCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxMouseOut <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">this</span>.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxActiveClass<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onDocumentMouseUp <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw2">var</span> oCheckbox<span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bBlockDocumentMouseUp<span class="br0">)</span> <span class="br0">{</span>
+
+ oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span>event.<span class="me1">target</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="br0">(</span>oCheckbox <span class="sy0">&&</span> <span class="sy0">!</span>oCheckbox.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="sy0">||</span> <span class="sy0">!</span>oCheckbox<span class="br0">)</span> <span class="br0">{</span>
+ clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span>
+
+ bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxFocus <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// Remove the focus style from any checkbox that might still have it</span>
+
+ <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#checkboxes"</span><span class="br0">)</span>.<span class="me1">one</span><span class="br0">(</span><span class="st0">".yui-checkbox-focus"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>oCheckbox<span class="br0">)</span> <span class="br0">{</span>
+ oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="co1">// Defer adding key-related and click event listeners until </span>
+ <span class="co1">// one of the checkboxes is initially focused.</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bKeyListenersInitialized<span class="br0">)</span> <span class="br0">{</span>
+ initKeyListeners.<span class="me1">call</span><span class="br0">(</span>event.<span class="me1">container</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span>
+
+ oCheckbox.<span class="me1">addClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxBlur <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>bBlockBlur<span class="br0">)</span> <span class="br0">{</span>
+ bBlockBlur <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span>
+ <span class="kw1">return</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="kw2">var</span> oCheckbox <span class="sy0">=</span> getCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span>
+
+ oCheckbox.<span class="me1">removeClass</span><span class="br0">(</span>sCheckboxFocusClass<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bBlockClearActive <span class="sy0">&&</span> oCheckbox.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
+ clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ bBlockClearActive <span class="sy0">=</span> <span class="kw2">false</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxMouseDown <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// Defer adding mouse-related and click event listeners until </span>
+ <span class="co1">// the user mouses down on one of the checkboxes.</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>bMouseListenersInitialized<span class="br0">)</span> <span class="br0">{</span>
+ initMouseListeners.<span class="me1">call</span><span class="br0">(</span>event.<span class="me1">container</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="kw2">var</span> oCheckbox<span class="sy0">,</span>
+ oInput<span class="sy0">;</span>
+
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="kw1">this</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"nodeName"</span><span class="br0">)</span>.<span class="me1">toLowerCase</span><span class="br0">(</span><span class="br0">)</span> <span class="sy0">===</span> <span class="st0">"label"</span><span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// If the target of the event was the checkbox's label element, the</span>
+ <span class="co1">// label will dispatch a click event to the checkbox, meaning the </span>
+ <span class="co1">// "onCheckboxClick" handler will be called twice. For that reason</span>
+ <span class="co1">// it is necessary to block the "onDocumentMouseUp" handler from</span>
+ <span class="co1">// clearing the active state, so that a reference to the active </span>
+ <span class="co1">// checkbox still exists the second time the "onCheckboxClick"</span>
+ <span class="co1">// handler is called.</span>
+
+ bBlockDocumentMouseUp <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span>
+
+ <span class="co1">// When the user clicks the label instead of the checkbox itself, </span>
+ <span class="co1">// the checkbox will be blurred if it has focus. Since the </span>
+ <span class="co1">// "onCheckboxBlur" handler clears the active state it is </span>
+ <span class="co1">// necessary to block the clearing of the active state when the </span>
+ <span class="co1">// label is clicked instead of the checkbox itself.</span>
+
+ bBlockClearActive <span class="sy0">=</span> <span class="kw2">true</span><span class="sy0">;</span>
+
+ oCheckbox <span class="sy0">=</span> getCheckboxForLabel<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span>
+ <span class="kw1">else</span> <span class="br0">{</span>
+
+ oCheckbox <span class="sy0">=</span> <span class="kw1">this</span><span class="sy0">;</span>
+
+ <span class="br0">}</span>
+
+ <span class="co1">// Need to focus the input manually for two reasons:</span>
+ <span class="co1">// 1) Mousing down on a label in Webkit doesn't focus its </span>
+ <span class="co1">// associated checkbox</span>
+ <span class="co1">// 2) By default checkboxes are focused when the user mouses </span>
+ <span class="co1">// down on them. However, since the actually checkbox is </span>
+ <span class="co1">// obscurred by the two span elements that are used to </span>
+ <span class="co1">// style it, the checkbox wont' receive focus as it was </span>
+ <span class="co1">// never the actual target of the mousedown event.</span>
+
+ oInput <span class="sy0">=</span> oCheckbox.<span class="me1">one</span><span class="br0">(</span><span class="st0">"input"</span><span class="br0">)</span><span class="sy0">;</span>
+
+
+ <span class="co1">// Calling Event.preventDefault won't block the blurring of the </span>
+ <span class="co1">// currently focused element in IE, so we'll use the "bBlockBlur"</span>
+ <span class="co1">// variable to stop the code in the blur event handler </span>
+ <span class="co1">// from executing.</span>
+
+ bBlockBlur <span class="sy0">=</span> <span class="br0">(</span>UA.<span class="me1">ie</span> <span class="sy0">&&</span> oInput.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span>
+
+
+ oInput.<span class="kw3">focus</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
+
+ setActiveCheckbox<span class="br0">(</span>oCheckbox<span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="co1">// Need to call preventDefault because by default mousing down on</span>
+ <span class="co1">// an element will blur the element in the document that currently </span>
+ <span class="co1">// has focus--in this case, the input element that was </span>
+ <span class="co1">// just focused.</span>
+
+ event.<span class="me1">preventDefault</span><span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxClick <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="kw2">var</span> oInput<span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="kw1">this</span>.<span class="me1">compareTo</span><span class="br0">(</span>oActiveCheckbox<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
+
+ oInput <span class="sy0">=</span> <span class="kw1">this</span>.<span class="me1">one</span><span class="br0">(</span><span class="st0">"input"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>event.<span class="me1">target</span>.<span class="me1">compareTo</span><span class="br0">(</span>oInput<span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// If the click event was fired via the mouse the checked</span>
+ <span class="co1">// state will have to be manually updated since the input </span>
+ <span class="co1">// is hidden offscreen and therefore couldn't be the </span>
+ <span class="co1">// target of the click.</span>
+
+ oInput.<span class="me1">set</span><span class="br0">(</span><span class="st0">"checked"</span><span class="sy0">,</span> <span class="br0">(</span><span class="sy0">!</span>oInput.<span class="me1">get</span><span class="br0">(</span><span class="st0">"checked"</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span>
+
+ updateCheckedState<span class="br0">(</span>oInput<span class="br0">)</span><span class="sy0">;</span>
+ clearActiveCheckbox<span class="br0">(</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="br0">}</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+
+ <span class="kw2">var</span> onCheckboxKeyDown <span class="sy0">=</span> <span class="kw2">function</span> <span class="br0">(</span>event<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// Style the checkbox as being active when the user presses the </span>
+ <span class="co1">// space bar</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span>event.<span class="me1">keyCode</span> <span class="sy0">===</span> <span class="nu0">32</span><span class="br0">)</span> <span class="br0">{</span>
+ setActiveCheckbox<span class="br0">(</span><span class="kw1">this</span><span class="br0">)</span><span class="sy0">;</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span><span class="sy0">;</span>
+
+ Y.<span class="me1">all</span><span class="br0">(</span><span class="st0">"#checkboxes>div>span"</span><span class="br0">)</span>.<span class="me1">addClass</span><span class="br0">(</span><span class="st0">"yui-checkbox"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="co1">// Remove the "yui-checkboxes-loading" class used to hide the </span>
+ <span class="co1">// checkboxes now that the checkboxes have been skinned.</span>
+
+ Y.<span class="me1">one</span><span class="br0">(</span><span class="st0">"#checkboxes"</span><span class="br0">)</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"ownerDocument"</span><span class="br0">)</span>.<span class="me1">get</span><span class="br0">(</span><span class="st0">"documentElement"</span><span class="br0">)</span>.<span class="me1">removeClass</span><span class="br0">(</span><span class="st0">"yui-checkboxes-loading"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="co1">// Add the minimum number of event listeners needed to start, bind the </span>
+ <span class="co1">// rest when needed</span>
+
+ Y.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"mousedown"</span><span class="sy0">,</span> onCheckboxMouseDown<span class="sy0">,</span> <span class="st0">"#checkboxes"</span><span class="sy0">,</span> <span class="st0">".yui-checkbox,label"</span><span class="br0">)</span><span class="sy0">;</span>
+ Y.<span class="me1">delegate</span><span class="br0">(</span><span class="st0">"focus"</span><span class="sy0">,</span> onCheckboxFocus<span class="sy0">,</span> <span class="st0">"#checkboxes"</span><span class="sy0">,</span> <span class="st0">"input[type=checkbox]"</span><span class="br0">)</span><span class="sy0">;</span>
+
+<span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span></pre></div><textarea id="syntax3-plain">YUI().use("*", function(Y) {
+
+ var UA = Y.UA,
+ getClassName = Y.ClassNameManager.getClassName,
+ sCheckboxFocusClass = getClassName("checkbox", "focus"), // Create yui-checkbox-focus
+ sCheckboxCheckedClass = getClassName("checkbox", "checked"), // Create yui-checkbox-checked
+ sCheckboxActiveClass = getClassName("checkbox", "active"), // Create yui-checkbox-active
+ bKeyListenersInitialized = false,
+ bMouseListenersInitialized = false,
+ forAttr = (UA.ie && UA.ie < 8) ? "htmlFor" : "for",
+ bBlockDocumentMouseUp = false,
+ bBlockClearActive = false,
+ bBlockBlur = false,
+ oActiveCheckbox;
+
+
+ var initKeyListeners = function () {
+
+ this.delegate("keydown", onCheckboxKeyDown, ".yui-checkbox");
+ this.delegate("click", onCheckboxClick, ".yui-checkbox");
+ this.delegate("blur", onCheckboxBlur, "input[type=checkbox]");
+
+ bKeyListenersInitialized = true;
+
+ };
+
+
+ var initMouseListeners = function () {
+
+ this.delegate("mouseover", onCheckboxMouseOver, ".yui-checkbox");
+ this.delegate("mouseout", onCheckboxMouseOut, ".yui-checkbox-active");
+ this.get("ownerDocument").on("mouseup", onDocumentMouseUp);
+
+ bMouseListenersInitialized = true;
+
+ };
+
+
+ var getCheckbox = function (node) {
+
+ return (node.hasClass("yui-checkbox") ? node : node.ancestor(".yui-checkbox"));
+
+ };
+
+
+ var getCheckboxForLabel = function (label) {
+
+ var sID = label.getAttribute(forAttr),
+ oInput,
+ oCheckbox;
+
+ if (sID) {
+
+ oInput = Y.one("#" + sID);
+
+ if (oInput) {
+ oCheckbox = getCheckbox(oInput);
+ }
+
+ }
+
+ return oCheckbox;
+
+ };
+
+
+ var updateCheckedState = function (input) {
+
+ var oCheckbox = getCheckbox(input);
+
+ if (input.get("checked")) {
+ oCheckbox.addClass(sCheckboxCheckedClass);
+ }
+ else {
+ oCheckbox.removeClass(sCheckboxCheckedClass);
+ }
+
+ };
+
+
+ var setActiveCheckbox = function (checkbox) {
+
+ checkbox.addClass(sCheckboxActiveClass);
+ oActiveCheckbox = checkbox;
+
+ };
+
+
+ var clearActiveCheckbox = function () {
+
+ if (oActiveCheckbox) {
+ oActiveCheckbox.removeClass(sCheckboxActiveClass);
+ oActiveCheckbox = null;
+ }
+
+ };
+
+
+ var onCheckboxMouseOver = function (event, matchedEl) {
+
+ if (oActiveCheckbox && oActiveCheckbox.compareTo(this)) {
+ oActiveCheckbox.addClass(sCheckboxActiveClass);
+ }
+
+ };
+
+
+ var onCheckboxMouseOut = function (event) {
+
+ this.removeClass(sCheckboxActiveClass);
+
+ };
+
+
+ var onDocumentMouseUp = function (event) {
+
+ var oCheckbox;
+
+ if (!bBlockDocumentMouseUp) {
+
+ oCheckbox = getCheckbox(event.target);
+
+ if ((oCheckbox && !oCheckbox.compareTo(oActiveCheckbox)) || !oCheckbox) {
+ clearActiveCheckbox();
+ }
+
+ }
+
+ bBlockDocumentMouseUp = false;
+
+ };
+
+
+ var onCheckboxFocus = function (event) {
+
+ // Remove the focus style from any checkbox that might still have it
+
+ var oCheckbox = Y.one("#checkboxes").one(".yui-checkbox-focus");
+
+ if (oCheckbox) {
+ oCheckbox.removeClass(sCheckboxFocusClass);
+ }
+
+ // Defer adding key-related and click event listeners until
+ // one of the checkboxes is initially focused.
+
+ if (!bKeyListenersInitialized) {
+ initKeyListeners.call(event.container);
+ }
+
+ var oCheckbox = getCheckbox(this);
+
+ oCheckbox.addClass(sCheckboxFocusClass);
+
+ };
+
+
+ var onCheckboxBlur = function (event) {
+
+ if (bBlockBlur) {
+ bBlockBlur = false;
+ return;
+ }
+
+ var oCheckbox = getCheckbox(this);
+
+ oCheckbox.removeClass(sCheckboxFocusClass);
+
+ if (!bBlockClearActive && oCheckbox.compareTo(oActiveCheckbox)) {
+ clearActiveCheckbox();
+ }
+
+ bBlockClearActive = false;
+
+ };
+
+
+ var onCheckboxMouseDown = function (event) {
+
+ // Defer adding mouse-related and click event listeners until
+ // the user mouses down on one of the checkboxes.
+
+ if (!bMouseListenersInitialized) {
+ initMouseListeners.call(event.container);
+ }
+
+ var oCheckbox,
+ oInput;
+
+
+ if (this.get("nodeName").toLowerCase() === "label") {
+
+ // If the target of the event was the checkbox's label element, the
+ // label will dispatch a click event to the checkbox, meaning the
+ // "onCheckboxClick" handler will be called twice. For that reason
+ // it is necessary to block the "onDocumentMouseUp" handler from
+ // clearing the active state, so that a reference to the active
+ // checkbox still exists the second time the "onCheckboxClick"
+ // handler is called.
+
+ bBlockDocumentMouseUp = true;
+
+ // When the user clicks the label instead of the checkbox itself,
+ // the checkbox will be blurred if it has focus. Since the
+ // "onCheckboxBlur" handler clears the active state it is
+ // necessary to block the clearing of the active state when the
+ // label is clicked instead of the checkbox itself.
+
+ bBlockClearActive = true;
+
+ oCheckbox = getCheckboxForLabel(this);
+
+ }
+ else {
+
+ oCheckbox = this;
+
+ }
+
+ // Need to focus the input manually for two reasons:
+ // 1) Mousing down on a label in Webkit doesn't focus its
+ // associated checkbox
+ // 2) By default checkboxes are focused when the user mouses
+ // down on them. However, since the actually checkbox is
+ // obscurred by the two span elements that are used to
+ // style it, the checkbox wont' receive focus as it was
+ // never the actual target of the mousedown event.
+
+ oInput = oCheckbox.one("input");
+
+
+ // Calling Event.preventDefault won't block the blurring of the
+ // currently focused element in IE, so we'll use the "bBlockBlur"
+ // variable to stop the code in the blur event handler
+ // from executing.
+
+ bBlockBlur = (UA.ie && oInput.get("checked"));
+
+
+ oInput.focus();
+
+ setActiveCheckbox(oCheckbox);
+
+ // Need to call preventDefault because by default mousing down on
+ // an element will blur the element in the document that currently
+ // has focus--in this case, the input element that was
+ // just focused.
+
+ event.preventDefault();
+
+ };
+
+
+ var onCheckboxClick = function (event) {
+
+ var oInput;
+
+ if (this.compareTo(oActiveCheckbox)) {
+
+ oInput = this.one("input");
+
+ if (!event.target.compareTo(oInput)) {
+
+ // If the click event was fired via the mouse the checked
+ // state will have to be manually updated since the input
+ // is hidden offscreen and therefore couldn't be the
+ // target of the click.
+
+ oInput.set("checked", (!oInput.get("checked")));
+
+ }
+
+ updateCheckedState(oInput);
+ clearActiveCheckbox();
+
+ }
+
+ };
+
+
+ var onCheckboxKeyDown = function (event) {
+
+ // Style the checkbox as being active when the user presses the
+ // space bar
+
+ if (event.keyCode === 32) {
+ setActiveCheckbox(this);
+ }
+
+ };
+
+ Y.all("#checkboxes>div>span").addClass("yui-checkbox");
+
+ // Remove the "yui-checkboxes-loading" class used to hide the
+ // checkboxes now that the checkboxes have been skinned.
+
+ Y.one("#checkboxes").get("ownerDocument").get("documentElement").removeClass("yui-checkboxes-loading");
+
+ // Add the minimum number of event listeners needed to start, bind the
+ // rest when needed
+
+ Y.delegate("mousedown", onCheckboxMouseDown, "#checkboxes", ".yui-checkbox,label");
+ Y.delegate("focus", onCheckboxFocus, "#checkboxes", "input[type=checkbox]");
+
+});</textarea></div>
+<h4>Progressive Enhancement</h4>
+<p>
+The markup above will be transformed using both CSS and JavaScript. To account
+for the scenario where the user has CSS enabled in their browser but JavaScript
+is disabled, the CSS used to style the checkboxes will be loaded via JavaScript
+using the YUI instance's <a href="http://developer.yahoo.com/yui/3/yui#loader">built-in Loader</a>.
+Additionally, a small block of JavaScript will be placed in the
+<code><head></code> — used to temporarily hide the markup
+while the JavaScript and CSS are in the process of loading to prevent the user
+from seeing a flash unstyled content.
+</p>
+<div id="syntax4" class="yui-syntax-highlight"><div class="numbers"><pre class="javascript" style="font-family:monospace;"><ol><li class="li1"><div class="de1">YUI<span class="br0">(</span><span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> base<span class="sy0">:</span> <span class="st0">"../../build/"</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="co1">// Load the stylesheet for the skinned checkboxes via JavaScript, </span></div></li><li class="li1"><div class="de1"> <span class="co1">// since without JavaScript skinning of the checkboxes wouldn't </span></div></li><li class="li1"><div class="de1"> <span class="co1">// be possible.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> modules<span class="sy0">:</span> <span class="br0">{</span></div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="st0">"checkboxcss"</span><span class="sy0">:</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> type<span class="sy0">:</span> <span class="st0">"css"</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> fullpath<span class="sy0">:</span> <span class="st0">"assets/checkbox.css"</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span><span class="sy0">,</span></div></li><li class="li2"><div class="de2"> <span class="st0">"checkboxjs"</span><span class="sy0">:</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> type<span class="sy0">:</span> <span class="st0">"js"</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> fullpath<span class="sy0">:</span> <span class="st0">"assets/checkbox.js"</span><span class="sy0">,</span></div></li><li class="li1"><div class="de1"> requires<span class="sy0">:</span> <span class="br0">[</span><span class="st0">"classnamemanager"</span><span class="sy0">,</span> <span class="st0">"event-focus"</span><span class="sy0">,</span> <span class="st0">"node-event-delegate"</span><span class="sy0">,</span> <span class="st0">"checkboxcss"</span><span class="br0">]</span></div></li><li class="li1"><div class="de1"> <span class="br0">}</span> </div></li><li class="li2"><div class="de2"> </div></li><li class="li1"><div class="de1"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="br0">}</span><span class="br0">)</span>.<span class="kw2">use</span><span class="br0">(</span><span class="st0">"checkboxjs"</span><span class="sy0">,</span> <span class="kw2">function</span><span class="br0">(</span>Y<span class="sy0">,</span> result<span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="co1">// The callback supplied to use() will be executed regardless of</span></div></li><li class="li1"><div class="de1"> <span class="co1">// whether the operation was successful or not. The second parameter</span></div></li><li class="li1"><div class="de1"> <span class="co1">// is a result object that has the status of the operation. We can</span></div></li><li class="li1"><div class="de1"> <span class="co1">// use this to try to recover from failures or timeouts.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>result.<span class="me1">success</span><span class="br0">)</span> <span class="br0">{</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> Y.<span class="me1">log</span><span class="br0">(</span><span class="st0">"Load failure: "</span> <span class="sy0">+</span> result.<span class="me1">msg</span><span class="sy0">,</span> <span class="st0">"warn"</span><span class="sy0">,</span> <span class="st0">"Example"</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> <span class="co1">// Show the checkboxes if the loader failed that way the original </span></div></li><li class="li2"><div class="de2"> <span class="co1">// unskinned checkboxes will be visible so that the user can</span></div></li><li class="li1"><div class="de1"> <span class="co1">// interact with them either way.</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"> document.<span class="me1">documentElement</span>.<span class="me1">className</span> <span class="sy0">=</span> <span class="st0">""</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li2"><div class="de2"> <span class="br0">}</span></div></li><li class="li1"><div class="de1"> </div></li><li class="li1"><div class="de1"><span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span></div></li><li class="li1"><div class="de1"> </div></li></ol></pre></div><div class="nonumbers"><pre class="javascript" style="font-family:monospace;">YUI<span class="br0">(</span><span class="br0">{</span>
+
+ base<span class="sy0">:</span> <span class="st0">"../../build/"</span><span class="sy0">,</span>
+
+ <span class="co1">// Load the stylesheet for the skinned checkboxes via JavaScript, </span>
+ <span class="co1">// since without JavaScript skinning of the checkboxes wouldn't </span>
+ <span class="co1">// be possible.</span>
+
+ modules<span class="sy0">:</span> <span class="br0">{</span>
+
+ <span class="st0">"checkboxcss"</span><span class="sy0">:</span> <span class="br0">{</span>
+ type<span class="sy0">:</span> <span class="st0">"css"</span><span class="sy0">,</span>
+ fullpath<span class="sy0">:</span> <span class="st0">"assets/checkbox.css"</span>
+ <span class="br0">}</span><span class="sy0">,</span>
+ <span class="st0">"checkboxjs"</span><span class="sy0">:</span> <span class="br0">{</span>
+ type<span class="sy0">:</span> <span class="st0">"js"</span><span class="sy0">,</span>
+ fullpath<span class="sy0">:</span> <span class="st0">"assets/checkbox.js"</span><span class="sy0">,</span>
+ requires<span class="sy0">:</span> <span class="br0">[</span><span class="st0">"classnamemanager"</span><span class="sy0">,</span> <span class="st0">"event-focus"</span><span class="sy0">,</span> <span class="st0">"node-event-delegate"</span><span class="sy0">,</span> <span class="st0">"checkboxcss"</span><span class="br0">]</span>
+ <span class="br0">}</span>
+
+ <span class="br0">}</span>
+
+<span class="br0">}</span><span class="br0">)</span>.<span class="kw2">use</span><span class="br0">(</span><span class="st0">"checkboxjs"</span><span class="sy0">,</span> <span class="kw2">function</span><span class="br0">(</span>Y<span class="sy0">,</span> result<span class="br0">)</span> <span class="br0">{</span>
+
+ <span class="co1">// The callback supplied to use() will be executed regardless of</span>
+ <span class="co1">// whether the operation was successful or not. The second parameter</span>
+ <span class="co1">// is a result object that has the status of the operation. We can</span>
+ <span class="co1">// use this to try to recover from failures or timeouts.</span>
+
+ <span class="kw1">if</span> <span class="br0">(</span><span class="sy0">!</span>result.<span class="me1">success</span><span class="br0">)</span> <span class="br0">{</span>
+
+ Y.<span class="me1">log</span><span class="br0">(</span><span class="st0">"Load failure: "</span> <span class="sy0">+</span> result.<span class="me1">msg</span><span class="sy0">,</span> <span class="st0">"warn"</span><span class="sy0">,</span> <span class="st0">"Example"</span><span class="br0">)</span><span class="sy0">;</span>
+
+ <span class="co1">// Show the checkboxes if the loader failed that way the original </span>
+ <span class="co1">// unskinned checkboxes will be visible so that the user can</span>
+ <span class="co1">// interact with them either way.</span>
+
+ document.<span class="me1">documentElement</span>.<span class="me1">className</span> <span class="sy0">=</span> <span class="st0">""</span><span class="sy0">;</span>
+
+ <span class="br0">}</span>
+
+<span class="br0">}</span><span class="br0">)</span><span class="sy0">;</span>
+ </pre></div><textarea id="syntax4-plain">YUI({
+
+ base: "../../build/",
+
+ // Load the stylesheet for the skinned checkboxes via JavaScript,
+ // since without JavaScript skinning of the checkboxes wouldn't
+ // be possible.
+
+ modules: {
+
+ "checkboxcss": {
+ type: "css",
+ fullpath: "assets/checkbox.css"
+ },
+ "checkboxjs": {
+ type: "js",
+ fullpath: "assets/checkbox.js",
+ requires: ["classnamemanager", "event-focus", "node-event-delegate", "checkboxcss"]
+ }
+
+ }
+
+}).use("checkboxjs", function(Y, result) {
+
+ // The callback supplied to use() will be executed regardless of
+ // whether the operation was successful or not. The second parameter
+ // is a result object that has the status of the operation. We can
+ // use this to try to recover from failures or timeouts.
+
+ if (!result.success) {
+
+ Y.log("Load failure: " + result.msg, "warn", "Example");
+
+ // Show the checkboxes if the loader failed that way the original
+ // unskinned checkboxes will be visible so that the user can
+ // interact with them either way.
+
+ document.documentElement.className = "";
+
+ }
+
+});
+</textarea></div> </div>
+ <div class="yui-u sidebar">
+
+
+ <div id="examples" class="mod box4">
+ <div class="hd">
+ <h4>
+ Event Examples:</h4>
+ </div>
+ <div class="bd">
+ <ul>
+ <li><a href='../event/event-simple.html'>Simple DOM Events</a></li><li><a href='../event/event-timing.html'>Using 'available', 'contentready', and 'domready'</a></li><li><a href='../event/event-ce.html'>Using Custom Events</a></li><li class='selected'><a href='../event/event-focus-blur.html'>Skinning via Progressive Enhancement using the Event Utility and the Loader</a></li><li><a href='../yui/yui-augment.html'>Compose Classes of Objects with <code>augment</code> (included with examples for The YUI Global Object)</a></li><li><a href='../node-focusmanager/node-focusmanager-3.html'>Accessible Menu Button (included with examples for Focus Manager Node Plugin)</a></li><li><a href='../node-focusmanager/node-focusmanager-2.html'>Accessible TabView (included with examples for Focus Manager Node Plugin)</a></li><li><a href='../attribute/attribute-event.html'>Attribute Change Events (included with examples for Attribute)</a></li><li><a href='../attribute/attribute-event-speeddate.html'>Attribute Event Based Speed Dating (included with examples for Attribute)</a></li><li><a href='../attribute/attribute-getset.html'>Attribute Getters, Setters and Validators (included with examples for Attribute)</a></li><li><a href='../widget/widget-extend.html'>Extending the base widget class (included with examples for Widget)</a></li><li><a href='../dd/photo-browser.html'>Photo Browser (included with examples for Drag & Drop)</a></li> </ul>
+ </div>
+ </div>
+
+ <div class="mod box4">
+ <div class="hd">
+ <h4>More Event Resources:</h4>
+ </div>
+ <div class="bd">
+ <ul>
+ <!-- <li><a href="http://developer.yahoo.com/yui/event/">User's Guide</a> (external)</li> -->
+<li><a href="../../api/module_event.html">API Documentation</a></li></ul>
+ </div>
+ </div>
+ </div>
+ </div>
+
+ </div>
+ </div>
+
+
+<div class="yui-b toc3" id="tocWrapper">
+<!-- TABLE OF CONTENTS -->
+<div id="toc">
+
+<ul>
+<li class="sect first">YUI 3 Resources</li><li class="item"><a title="YUI 3 -- Yahoo! User Interface (YUI) Library" href="http://developer.yahoo.com/yui/3/">YUI 3 Web Site</a></li><li class="item"><a title="Examples of every YUI utility and control in action" href="../../examples/">YUI 3 Examples</a></li><li class="item"><a title="Instantly searchable API documentation for the entire YUI library." href="../../api/">YUI 3 API Docs</a></li><li class="item"><a title="YUI 3 Dependency Configurator -- configure your custom YUI implementation" href="http://developer.yahoo.com/yui/3/configurator">YUI 3 Dependency Configurator</a></li><li class="item"><a title="The YUI 3 Forum on YUILibrary.com" href="http://yuilibrary.com/forum/viewforum.php?f=15">YUI 3 Forums (external)</a></li><li class="item"><a title="Found a bug or a missing feature? Let us know on YUILibrary.com." href="http://developer.yahoo.com/yui/articles/reportingbugs/">Bug Reports/Feature Requests</a></li><li class="item"><a title="YUI is free and open, offered under a BSD license." href="http://developer.yahoo.com/yui/license.html">YUI License</a></li><li class="item"><a title="Download and fork the YUI project on GitHub" href="http://github.com/yui">YUI on Github</a></li><li class="item"><a title="The Yahoo! User Interface Blog" href="http://yuiblog.com">YUI Blog (external)</a></li><li class="sect">YUI 3 Core - Examples</li><li class="item"><a title="YUI Global Object - Functional Examples" href="../../examples/yui/index.html">YUI Global Object</a></li><li class="selected "><a title="Event - Functional Examples" href="../../examples/event/index.html">Event</a></li><li class="item"><a title="Node - Functional Examples" href="../../examples/node/index.html">Node</a></li><li class="sect">YUI 3 Component Infrastructure - Examples</li><li class="item"><a title="Attribute - Functional Examples" href="../../examples/attribute/index.html">Attribute</a></li><li class="item"><a title="Plugin - Functional Examples" href="../../examples/plugin/index.html">Plugin <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="Widget - Functional Examples" href="../../examples/widget/index.html">Widget <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="sect">YUI 3 Utilities - Examples</li><li class="item"><a title="Animation - Functional Examples" href="../../examples/anim/index.html">Animation</a></li><li class="item"><a title="AsyncQueue - Functional Examples" href="../../examples/async-queue/index.html">AsyncQueue</a></li><li class="item"><a title="Browser History - Functional Examples" href="../../examples/history/index.html">Browser History</a></li><li class="item"><a title="Cache - Functional Examples" href="../../examples/cache/index.html">Cache</a></li><li class="item"><a title="Cookie - Functional Examples" href="../../examples/cookie/index.html">Cookie</a></li><li class="item"><a title="DataSchema - Functional Examples" href="../../examples/dataschema/index.html">DataSchema <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="DataSource - Functional Examples" href="../../examples/datasource/index.html">DataSource <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="DataType - Functional Examples" href="../../examples/datatype/index.html">DataType <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="Drag & Drop - Functional Examples" href="../../examples/dd/index.html">Drag & Drop</a></li><li class="item"><a title="Get - Functional Examples" href="../../examples/get/index.html">Get</a></li><li class="item"><a title="ImageLoader - Functional Examples" href="../../examples/imageloader/index.html">ImageLoader</a></li><li class="item"><a title="IO - Functional Examples" href="../../examples/io/index.html">IO</a></li><li class="item"><a title="JSON (JavaScript Object Notation) - Functional Examples" href="../../examples/json/index.html">JSON</a></li><li class="item"><a title="Stylesheet - Functional Examples" href="../../examples/stylesheet/index.html">Stylesheet</a></li><li class="sect">YUI 3 Widgets - Examples</li><li class="item"><a title="Overlay - Functional Examples" href="../../examples/overlay/index.html">Overlay <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="Slider - Functional Examples" href="../../examples/slider/index.html">Slider <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="sect">YUI 3 Node Plugins - Examples</li><li class="item"><a title="FocusManager Node Plugin - Functional Examples" href="../../examples/node-focusmanager/index.html">FocusManager Node Plugin <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="MenuNav Node Plugin - Functional Examples" href="../../examples/node-menunav/index.html">MenuNav Node Plugin <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="sect">YUI 3 CSS - Examples</li><li class="item"><a title="YUI CSS Reset - Functional Examples" href="../../examples/cssreset/index.html">CSS Reset</a></li><li class="item"><a title="YUI Fonts - Functional Examples" href="../../examples/cssfonts/index.html">CSS Fonts</a></li><li class="item"><a title="YUI Base - Functional Examples" href="../../examples/cssbase/index.html">CSS Base</a></li><li class="sect">YUI 3 Developer Tools - Examples</li><li class="item"><a title="Console - Functional Examples" href="../../examples/console/index.html">Console <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="Console Filters Plugin- Functional Examples" href="../../examples/console-filters/index.html">Plugin.ConsoleFilters <img src='http://l.yimg.com/a/i/not/beta_1.gif'></a></li><li class="item"><a title="Profiler - Functional Examples" href="../../examples/profiler/index.html">Profiler</a></li><li class="item"><a title="Test - Functional Examples" href="../../examples/test/index.html">Test</a></li><li class="sect">Other Useful YUI 3 Resources</li><li class="item"><a title="Answers to Frequently Asked Questions about the YUI Library" href="http://developer.yahoo.com/yui/articles/faq/">YUI FAQ (external)</a></li><li class="item"><a title="Yahoo!'s philosophy of Graded Browser Support" href="http://developer.yahoo.com/yui/articles/gbs/">Graded Browser Support (external)</a></li><li class="item"><a title="Videos and podcasts from the YUI Team and from the Yahoo! frontend engineering community." href="http://developer.yahoo.com/yui/theater/">YUI Theater (external)</a></li></ul>
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