/*

Author: mg12

Update: 2008/05/05

Author URI: http://www.neoease.com/

*/

(function() {

function $(id) {

	return document.getElementById(id);

}

function setStyleDisplay(id, status) {

	$(id).style.display = status;

}

function goTop(a, t) {

	a = a || 0.1;

	t = t || 16;

	var x1 = 0;

	var y1 = 0;

	var x2 = 0;

	var y2 = 0;

	var x3 = 0;

	var y3 = 0;

	if (document.documentElement) {

		x1 = document.documentElement.scrollLeft || 0;

		y1 = document.documentElement.scrollTop || 0;

	}

	if (document.body) {

		x2 = document.body.scrollLeft || 0;

		y2 = document.body.scrollTop || 0;

	}

	var x3 = window.scrollX || 0;

	var y3 = window.scrollY || 0;

	var x = Math.max(x1, Math.max(x2, x3));

	var y = Math.max(y1, Math.max(y2, y3));

	var speed = 1 + a;

	window.scrollTo(Math.floor(x / speed), Math.floor(y / speed));

	if(x > 0 || y > 0) {

		var f = "MGJS.goTop(" + a + ", " + t + ")";

		window.setTimeout(f, t);

	}

}

function switchTab(showPanels, hidePanels, activeTab, activeClass, fadeTab, fadeClass) {

	$(activeTab).className = activeClass;

	$(fadeTab).className = fadeClass;

	var panel, panelList;

	panelList = showPanels.split(',');

	for (var i = 0; i < panelList.length; i++) {

		var panel = panelList[i];

		if ($(panel)) {

			setStyleDisplay(panel, 'block');

		}

	}

	panelList = hidePanels.split(',');

	for (var i = 0; i < panelList.length; i++) {

		panel = panelList[i];

		if ($(panel)) {

			setStyleDisplay(panel, 'none');

		}

	}

}

function loadCommentShortcut() {

	$('comment').onkeydown = function (moz_ev) {

		var ev = null;

		if (window.event){

			ev = window.event;

		} else {

			ev = moz_ev;

		}

		if (ev != null && ev.ctrlKey && ev.keyCode == 13) {

			$('submit').click();

		}

	}

	$('submit').value += ' (Ctrl+Enter)';

}

function getElementsByClassName(className, tag, parent) {

	parent = parent || document;

	var allTags = (tag == '*' && parent.all) ? parent.all : parent.getElementsByTagName(tag);

	var matchingElements = new Array();

	className = className.replace(/\-/g, '\\-');

	var regex = new RegExp('(^|\\s)' + className + '(\\s|$)');

	var element;

	for (var i = 0; i < allTags.length; i++) {

		element = allTags[i];

		if (regex.test(element.className)) {

			matchingElements.push(element);

		}

	}

	return matchingElements;

}

window['MGJS'] = {};

window['MGJS']['$'] = $;

window['MGJS']['setStyleDisplay'] = setStyleDisplay;

window['MGJS']['goTop'] = goTop;

window['MGJS']['switchTab'] = switchTab;

window['MGJS']['loadCommentShortcut'] = loadCommentShortcut;

window['MGJS']['getElementsByClassName'] = getElementsByClassName;

})();