/*  Copyright Mihai Bazon, 2002-2005  |  www.bazon.net/mishoo

 * -----------------------------------------------------------

 *

 * The DHTML Calendar, version 1.0 "It is happening again"

 *

 * Details and latest version at:

 * www.dynarch.com/projects/calendar

 *

 * This script is developed by Dynarch.com.  Visit us at www.dynarch.com.

 *

 * This script is distributed under the GNU Lesser General Public License.

 * Read the entire license text here: http://www.gnu.org/licenses/lgpl.html

 */

// $Id: calendar.js,v 1.51 2005/03/07 16:44:31 mishoo Exp $

/** The Calendar object constructor. */

Calendar = function (firstDayOfWeek, dateStr, onSelected, onClose) {

	// member variables

	this.activeDiv = null;

	this.currentDateEl = null;

	this.getDateStatus = null;

	this.getDateToolTip = null;

	this.getDateText = null;

	this.timeout = null;

	this.onSelected = onSelected || null;

	this.onClose = onClose || null;

	this.dragging = false;

	this.hidden = false;

	this.minYear = 1970;

	this.maxYear = 2050;

	this.dateFormat = Calendar._TT["DEF_DATE_FORMAT"];

	this.ttDateFormat = Calendar._TT["TT_DATE_FORMAT"];

	this.isPopup = true;

	this.weekNumbers = true;

	this.firstDayOfWeek = typeof firstDayOfWeek == "number" ? firstDayOfWeek : Calendar._FD; // 0 for Sunday, 1 for Monday, etc.

	this.showsOtherMonths = false;

	this.dateStr = dateStr;

	this.ar_days = null;

	this.showsTime = false;

	this.time24 = true;

	this.yearStep = 2;

	this.hiliteToday = true;

	this.multiple = null;

	// HTML elements

	this.table = null;

	this.element = null;

	this.tbody = null;

	this.firstdayname = null;

	// Combo boxes

	this.monthsCombo = null;

	this.yearsCombo = null;

	this.hilitedMonth = null;

	this.activeMonth = null;

	this.hilitedYear = null;

	this.activeYear = null;

	// Information

	this.dateClicked = false;

	// one-time initializations

	if (typeof Calendar._SDN == "undefined") {

		// table of short day names

		if (typeof Calendar._SDN_len == "undefined")

			Calendar._SDN_len = 3;

		var ar = new Array();

		for (var i = 8; i > 0;) {

			ar[--i] = Calendar._DN[i].substr(0, Calendar._SDN_len);

		}

		Calendar._SDN = ar;

		// table of short month names

		if (typeof Calendar._SMN_len == "undefined")

			Calendar._SMN_len = 3;

		ar = new Array();

		for (var i = 12; i > 0;) {

			ar[--i] = Calendar._MN[i].substr(0, Calendar._SMN_len);

		}

		Calendar._SMN = ar;

	}

};

// ** constants

/// "static", needed for event handlers.

Calendar._C = null;

/// detect a special case of "web browser"

Calendar.is_ie = ( /msie/i.test(navigator.userAgent) &&

		   !/opera/i.test(navigator.userAgent) );

Calendar.is_ie5 = ( Calendar.is_ie && /msie 5\.0/i.test(navigator.userAgent) );

/// detect Opera browser

Calendar.is_opera = /opera/i.test(navigator.userAgent);

/// detect KHTML-based browsers

Calendar.is_khtml = /Konqueror|Safari|KHTML/i.test(navigator.userAgent);

// BEGIN: UTILITY FUNCTIONS; beware that these might be moved into a separate

//        library, at some point.

Calendar.getAbsolutePos = function(el) {

	var SL = 0, ST = 0;

	var is_div = /^div$/i.test(el.tagName);

	if (is_div && el.scrollLeft)

		SL = el.scrollLeft;

	if (is_div && el.scrollTop)

		ST = el.scrollTop;

	var r = { x: el.offsetLeft - SL, y: el.offsetTop - ST };

	if (el.offsetParent) {

		var tmp = this.getAbsolutePos(el.offsetParent);

		r.x += tmp.x;

		r.y += tmp.y;

	}

	return r;

};

Calendar.isRelated = function (el, evt) {

	var related = evt.relatedTarget;

	if (!related) {

		var type = evt.type;

		if (type == "mouseover") {

			related = evt.fromElement;

		} else if (type == "mouseout") {

			related = evt.toElement;

		}

	}

	while (related) {

		if (related == el) {

			return true;

		}

		related = related.parentNode;

	}

	return false;

};

Calendar.removeClass = function(el, className) {

	if (!(el && el.className)) {

		return;

	}

	var cls = el.className.split(" ");

	var ar = new Array();

	for (var i = cls.length; i > 0;) {

		if (cls[--i] != className) {

			ar[ar.length] = cls[i];

		}

	}

	el.className = ar.join(" ");

};

Calendar.addClass = function(el, className) {

	Calendar.removeClass(el, className);

	el.className += " " + className;

};

// FIXME: the following 2 functions totally suck, are useless and should be replaced immediately.

Calendar.getElement = function(ev) {

	var f = Calendar.is_ie ? window.event.srcElement : ev.currentTarget;

	while (f.nodeType != 1 || /^div$/i.test(f.tagName))

		f = f.parentNode;

	return f;

};

Calendar.getTargetElement = function(ev) {

	var f = Calendar.is_ie ? window.event.srcElement : ev.target;

	while (f.nodeType != 1)

		f = f.parentNode;

	return f;

};

Calendar.stopEvent = function(ev) {

	ev || (ev = window.event);

	if (Calendar.is_ie) {

		ev.cancelBubble = true;

		ev.returnValue = false;

	} else {

		ev.preventDefault();

		ev.stopPropagation();

	}

	return false;

};

Calendar.addEvent = function(el, evname, func) {

	if (el.attachEvent) { // IE

		el.attachEvent("on" + evname, func);

	} else if (el.addEventListener) { // Gecko / W3C

		el.addEventListener(evname, func, true);

	} else {

		el["on" + evname] = func;

	}

};

Calendar.removeEvent = function(el, evname, func) {

	if (el.detachEvent) { // IE

		el.detachEvent("on" + evname, func);

	} else if (el.removeEventListener) { // Gecko / W3C

		el.removeEventListener(evname, func, true);

	} else {

		el["on" + evname] = null;

	}

};

Calendar.createElement = function(type, parent) {

	var el = null;

	if (document.createElementNS) {

		// use the XHTML namespace; IE won't normally get here unless

		// _they_ "fix" the DOM2 implementation.

		el = document.createElementNS("http://www.w3.org/1999/xhtml", type);

	} else {

		el = document.createElement(type);

	}

	if (typeof parent != "undefined") {

		parent.appendChild(el);

	}

	return el;

};

// END: UTILITY FUNCTIONS

// BEGIN: CALENDAR STATIC FUNCTIONS

/** Internal -- adds a set of events to make some element behave like a button. */

Calendar._add_evs = function(el) {

	with (Calendar) {

		addEvent(el, "mouseover", dayMouseOver);

		addEvent(el, "mousedown", dayMouseDown);

		addEvent(el, "mouseout", dayMouseOut);

		if (is_ie) {

			addEvent(el, "dblclick", dayMouseDblClick);

			el.setAttribute("unselectable", true);

		}

	}

};

Calendar.findMonth = function(el) {

	if (typeof el.month != "undefined") {

		return el;

	} else if (typeof el.parentNode.month != "undefined") {

		return el.parentNode;

	}

	return null;

};

Calendar.findYear = function(el) {

	if (typeof el.year != "undefined") {

		return el;

	} else if (typeof el.parentNode.year != "undefined") {

		return el.parentNode;

	}

	return null;

};

Calendar.showMonthsCombo = function () {

	var cal = Calendar._C;

	if (!cal) {

		return false;

	}

	var cal = cal;

	var cd = cal.activeDiv;

	var mc = cal.monthsCombo;

	if (cal.hilitedMonth) {

		Calendar.removeClass(cal.hilitedMonth, "hilite");

	}

	if (cal.activeMonth) {

		Calendar.removeClass(cal.activeMonth, "active");

	}

	var mon = cal.monthsCombo.getElementsByTagName("div")[cal.date.getMonth()];

	Calendar.addClass(mon, "active");

	cal.activeMonth = mon;

	var s = mc.style;

	s.display = "block";

	if (cd.navtype < 0)

		s.left = cd.offsetLeft + "px";

	else {

		var mcw = mc.offsetWidth;

		if (typeof mcw == "undefined")

			// Konqueror brain-dead techniques

			mcw = 50;

		s.left = (cd.offsetLeft + cd.offsetWidth - mcw) + "px";

	}

	s.top = (cd.offsetTop + cd.offsetHeight) + "px";

};

Calendar.showYearsCombo = function (fwd) {

	var cal = Calendar._C;

	if (!cal) {

		return false;

	}

	var cal = cal;

	var cd = cal.activeDiv;

	var yc = cal.yearsCombo;

	if (cal.hilitedYear) {

		Calendar.removeClass(cal.hilitedYear, "hilite");

	}

	if (cal.activeYear) {

		Calendar.removeClass(cal.activeYear, "active");

	}

	cal.activeYear = null;

	var Y = cal.date.getFullYear() + (fwd ? 1 : -1);

	var yr = yc.firstChild;

	var show = false;

	for (var i = 12; i > 0; --i) {

		if (Y >= cal.minYear && Y <= cal.maxYear) {

			yr.innerHTML = Y;

			yr.year = Y;

			yr.style.display = "block";

			show = true;

		} else {

			yr.style.display = "none";

		}

		yr = yr.nextSibling;

		Y += fwd ? cal.yearStep : -cal.yearStep;

	}

	if (show) {

		var s = yc.style;

		s.display = "block";

		if (cd.navtype < 0)

			s.left = cd.offsetLeft + "px";

		else {

			var ycw = yc.offsetWidth;

			if (typeof ycw == "undefined")

				// Konqueror brain-dead techniques

				ycw = 50;

			s.left = (cd.offsetLeft + cd.offsetWidth - ycw) + "px";

		}

		s.top = (cd.offsetTop + cd.offsetHeight) + "px";

	}

};

// event handlers

Calendar.tableMouseUp = function(ev) {

	var cal = Calendar._C;

	if (!cal) {

		return false;

	}

	if (cal.timeout) {

		clearTimeout(cal.timeout);

	}

	var el = cal.activeDiv;

	if (!el) {

		return false;

	}

	var target = Calendar.getTargetElement(ev);

	ev || (ev = window.event);