/*  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))