From ccf76e430b7703db028966a845a966f50956f490 Mon Sep 17 00:00:00 2001
From: xue <>
Date: Mon, 5 Dec 2005 01:00:16 +0000
Subject:

---
 framework/Web/Javascripts/base/datepicker.js | 928 +++++++++++++++++++++++++++
 1 file changed, 928 insertions(+)
 create mode 100644 framework/Web/Javascripts/base/datepicker.js

(limited to 'framework/Web/Javascripts/base/datepicker.js')

diff --git a/framework/Web/Javascripts/base/datepicker.js b/framework/Web/Javascripts/base/datepicker.js
new file mode 100644
index 00000000..046a0a4b
--- /dev/null
+++ b/framework/Web/Javascripts/base/datepicker.js
@@ -0,0 +1,928 @@
+Prado.Calendar = Class.create();
+
+Prado.Calendar.Util = Class.create();
+
+Object.extend(Prado.Calendar.Util,
+{
+	// utility function to pad a number to a given width
+	pad : function(number, X)
+	{
+		X = (!X ? 2 : X);
+		number = ""+number;
+		while (number.length < X)
+			number = "0" + number;
+		return number;
+	},
+	
+	//allow for deprecated formats
+	FormatDate : function(date, format)
+	{
+		if(!isObject(date)) return "";
+		if(format.indexOf("%") > -1)
+		{
+			alert('Please use the new SimpleDateFormat pattern, e.g. yyyy-MM-dd');
+			return this.FormatDateDepr(date,format);
+		}
+		else
+		{
+			return this.SimpleFormatDate(date, format);
+		}
+	},
+	
+	//allow for deprecated format
+	ParseDate : function(value, format)
+	{
+		val=String(value);
+		format=String(format);
+		
+		if(val.length <= 0) return null;
+		
+		if(format.length <= 0) return new Date(value);
+		
+		if(format.indexOf("%") > -1)
+			return this.ParseDateDepr(value, format);
+		else
+			return this.SimpleParseDate(value, format);
+	},
+	
+	//deprecated format 
+	FormatDateDepr : function(date, str)
+	{
+		var m = date.getMonth();
+		var d = date.getDate();
+		var y = date.getFullYear();
+		
+		var s = {};
+		
+		s["%d"] = this.pad(d); // the day of the month (range 01 to 31)
+		s["%e"] = d; // the day of the month (range 1 to 31)
+		s["%m"] = this.pad(m+1);
+		s["%y"] = ('' + y).substr(2, 2); // year without the century (range 00 to 99)
+		s["%Y"] = y;		// year with the century
+			
+		var re = /%./g;
+		
+		var a = str.match(re);
+		for (var i = 0; i < a.length; i++) 
+		{
+			var tmp = s[a[i]];
+			if (tmp) 
+			{
+				re = new RegExp(a[i], 'g');
+				str = str.replace(re, tmp);
+			}
+		}
+
+		return str;
+	},
+	
+	//deprecated format parser
+	ParseDateDepr : function(value, format)
+	{
+		var y = 0;
+		var m = -1;
+		var d = 0;
+		var a = value.split(/\W+/);
+		var b = format.match(/%./g);
+		var i = 0, j = 0;
+		var hr = 0;
+		var min = 0;
+		for (i = 0; i < a.length; ++i) {
+			if (!a[i])
+				continue;
+			switch (b[i]) {
+			    case "%d":
+			    case "%e":
+				d = parseInt(a[i], 10);
+				break;
+
+			    case "%m":
+				m = parseInt(a[i], 10) - 1;
+				break;
+
+			    case "%Y":
+			    case "%y":
+				y = parseInt(a[i], 10);
+				(y < 100) && (y += (y > 29) ? 1900 : 2000);
+				break;
+
+			    case "%H":
+			    case "%I":
+			    case "%k":
+			    case "%l":
+				hr = parseInt(a[i], 10);
+				break;
+
+			    case "%P":
+			    case "%p":
+				if (/pm/i.test(a[i]) && hr < 12)
+					hr += 12;
+				break;
+
+			    case "%M":
+				min = parseInt(a[i], 10);
+				break;
+			}
+		}
+		if (y != 0 && m != -1 && d != 0)
+		{
+			var date = new Date(y, m, d, hr, min, 0);
+			return (isObject(date)
+					&& y == date.getFullYear() 
+					&& m == date.getMonth() 
+					&& d == date.getDate()) ? date : null;
+		}
+		return null;
+	},
+	
+	SimpleFormatDate : function(date, format)
+	{
+		if(!isObject(date)) return "";
+		var bits = new Array();
+		bits['d'] = date.getDate();
+		bits['dd'] = this.pad(date.getDate(),2);
+		
+		bits['M'] = date.getMonth()+1;
+		bits['MM'] = this.pad(date.getMonth()+1,2);
+    
+		var yearStr = "" + date.getFullYear();
+		yearStr = (yearStr.length == 2) ? '19' + yearStr: yearStr;
+		bits['yyyy'] = yearStr;
+		bits['yy'] = bits['yyyy'].toString().substr(2,2);
+
+		// do some funky regexs to replace the format string
+		// with the real values
+		var frm = new String(format);
+		for (var sect in bits) 
+		{
+			var reg = new RegExp("\\b"+sect+"\\b" ,"g");
+			frm = frm.replace(reg, bits[sect]);
+		}
+		return frm;
+	},
+	
+	SimpleParseDate : function(value, format)
+	{	
+		val=String(value);
+		format=String(format);
+		
+		if(val.length <= 0) return null;
+		
+		if(format.length <= 0) return new Date(value);
+			
+		var isInteger = function (val) 
+		{
+			var digits="1234567890";
+			for (var i=0; i < val.length; i++) 
+			{
+				if (digits.indexOf(val.charAt(i))==-1) { return false; }
+			}
+			return true;
+		};
+		
+		var getInt = function(str,i,minlength,maxlength) 
+		{
+			for (var x=maxlength; x>=minlength; x--) 
+			{
+				var token=str.substring(i,i+x);
+				if (token.length < minlength) { return null; }
+				if (isInteger(token)) { return token; }
+			}
+			return null;
+		};
+	
+		var i_val=0;
+		var i_format=0;
+		var c="";
+		var token="";
+		var token2="";
+		var x,y;
+		var now=new Date();
+		var year=now.getFullYear();
+		var month=now.getMonth()+1;
+		var date=1;
+	
+		while (i_format < format.length) 
+		{
+			// Get next token from format string
+			c=format.charAt(i_format);
+			token="";
+			while ((format.charAt(i_format)==c) && (i_format < format.length)) 
+			{
+				token += format.charAt(i_format++);
+			}
+		
+			// Extract contents of value based on format token
+			if (token=="yyyy" || token=="yy" || token=="y") 
+			{
+				if (token=="yyyy") { x=4;y=4; }
+				if (token=="yy")   { x=2;y=2; }
+				if (token=="y")    { x=2;y=4; }
+				year=getInt(val,i_val,x,y);
+				if (year==null) { return null; }
+				i_val += year.length;
+				if (year.length==2) 
+				{
+					if (year > 70) { year=1900+(year-0); }
+					else { year=2000+(year-0); }
+				}
+			}
+
+			else if (token=="MM"||token=="M") 
+			{
+				month=getInt(val,i_val,token.length,2);
+				if(month==null||(month<1)||(month>12)){return null;}
+				i_val+=month.length;
+			}
+			else if (token=="dd"||token=="d") 
+			{
+				date=getInt(val,i_val,token.length,2);
+				if(date==null||(date<1)||(date>31)){return null;}
+				i_val+=date.length;
+			}
+			else 
+			{
+				if (val.substring(i_val,i_val+token.length)!=token) {return null;}
+				else {i_val+=token.length;}
+			}
+		}
+	
+		// If there are any trailing characters left in the value, it doesn't match
+		if (i_val != val.length) { return null; }
+		
+		// Is date valid for month?
+		if (month==2) 
+		{
+			// Check for leap year
+			if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
+				if (date > 29){ return null; }
+			}
+			else { if (date > 28) { return null; } }
+		}
+	
+		if ((month==4)||(month==6)||(month==9)||(month==11)) 
+		{
+			if (date > 30) { return null; }
+		}
+		
+		var newdate=new Date(year,month-1,date, 0, 0, 0);
+		return newdate;
+	},
+		
+	IsLeapYear : function (year) 
+	{
+		return ((year%4 == 0) && ((year%100 != 0) || (year%400 == 0)));
+	},
+	
+	yearLength : function(year) 
+	{
+		if (this.isLeapYear(year))
+			return 366;
+		else
+			return 365;
+	},
+	
+	dayOfYear : function(date) 
+	{
+		var a = this.isLeapYear(date.getFullYear()) ? 
+					Calendar.LEAP_NUM_DAYS : Calendar.NUM_DAYS;	
+		return a[date.getMonth()] + date.getDate();
+	},
+	ISODate : function(date)
+	{
+		var y = date.getFullYear();
+		var m = this.pad(date.getMonth() + 1);
+		var d = this.pad(date.getDate());
+		return String(y) + String(m) + String(d);
+	},
+	
+	browser : function()
+	{
+		var info = { Version : "1.0" };
+		var is_major = parseInt( navigator.appVersion );
+		info.nver = is_major;
+		info.ver = navigator.appVersion;
+		info.agent = navigator.userAgent;
+		info.dom = document.getElementById ? 1 : 0;
+		info.opera = window.opera ? 1 : 0;
+		info.ie5 = ( info.ver.indexOf( "MSIE 5" ) > -1 && info.dom && !info.opera ) ? 1 : 0;
+		info.ie6 = ( info.ver.indexOf( "MSIE 6" ) > -1 && info.dom && !info.opera ) ? 1 : 0;
+		info.ie4 = ( document.all && !info.dom && !info.opera ) ? 1 : 0;
+		info.ie = info.ie4 || info.ie5 || info.ie6;
+		info.mac = info.agent.indexOf( "Mac" ) > -1;
+		info.ns6 = ( info.dom && parseInt( info.ver ) >= 5 ) ? 1 : 0;
+		info.ie3 = ( info.ver.indexOf( "MSIE" ) && ( is_major < 4 ) );
+		info.hotjava = ( info.agent.toLowerCase().indexOf( 'hotjava' ) != -1 ) ? 1 : 0;
+		info.ns4 = ( document.layers && !info.dom && !info.hotjava ) ? 1 : 0;
+		info.bw = ( info.ie6 || info.ie5 || info.ie4 || info.ns4 || info.ns6 || info.opera );
+		info.ver3 = ( info.hotjava || info.ie3 );
+		info.opera7 = ( ( info.agent.toLowerCase().indexOf( 'opera 7' ) > -1 ) || ( info.agent.toLowerCase().indexOf( 'opera/7' ) > -1 ) );
+		info.operaOld = info.opera && !info.opera7;
+		return info;
+	},
+	
+	ImportCss : function(doc, css_file) 
+	{
+		if (this.browser().ie)
+			var styleSheet = doc.createStyleSheet(css_file);
+		else 
+		{
+			var elm = doc.createElement("link");
+
+			elm.rel = "stylesheet";
+			elm.href = css_file;
+
+			if (headArr = doc.getElementsByTagName("head"))
+				headArr[0].appendChild(elm);
+		}
+	}
+});
+
+Object.extend(Prado.Calendar,
+{
+	// Accumulated days per month, for normal and for leap years.
+	// Used in week number calculations.	
+	NUM_DAYS : [0,31,59,90,120,151,181,212,243,273,304,334],
+	LEAP_NUM_DAYS : [0,31,60,91,121,152,182,213,244,274,305,335]
+});
+
+Prado.Calendar.prototype = 
+{
+	monthNames : [	"January",		"February",		"March",	"April",
+		"May",			"June",			"July",		"August",
+		"September",	"October",		"November",	"December"
+	],
+
+	shortWeekDayNames : ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ],
+
+	format : "yyyy-MM-dd",
+	
+	css : "calendar_system.css",
+	
+	initialize : function(control, attr)
+	{
+		this.attr = attr || [];
+		this.control = $(control);	
+		this.dateSlot = new Array(42);
+		this.weekSlot = new Array(6);
+		this.firstDayOfWeek = 1;
+		this.minimalDaysInFirstWeek	= 4;
+		this.currentDate = new Date();
+		this.selectedDate = null;
+		this.className = "Prado_Calendar";
+		
+		//which element to trigger to show the calendar
+		this.trigger = this.attr.trigger ? $(this.attr.trigger) : this.control;
+		Event.observe(this.trigger, "click", this.show.bind(this));
+		
+		Prado.Calendar.Util.ImportCss(document, this.css);
+		
+		if(this.attr.format) this.format = this.attr.format;
+		
+		//create it
+		this.create();	
+		this.hookEvents();	
+	},
+	
+	create : function()
+	{
+		var div;
+		var table;
+		var tbody;
+		var tr;
+		var td;
+	
+		// Create the top-level div element
+		this._calDiv = document.createElement("div");
+		this._calDiv.className = this.className;
+		this._calDiv.style.display = "none";		
+		
+		// header div
+		div = document.createElement("div");
+		div.className = "calendarHeader";
+		this._calDiv.appendChild(div);
+		
+		table = document.createElement("table");
+		table.style.cellSpacing = 0;
+		div.appendChild(table);
+		
+		tbody = document.createElement("tbody");
+		table.appendChild(tbody);
+		
+		tr = document.createElement("tr");
+		tbody.appendChild(tr);
+		
+		// Previous Month Button
+		td = document.createElement("td");
+		td.className = "prevMonthButton";
+		this._previousMonth = document.createElement("button");
+		this._previousMonth.appendChild(document.createTextNode("<<"));
+		td.appendChild(this._previousMonth);
+		tr.appendChild(td);
+		
+		
+		
+		//
+		// Create the month drop down 
+		//
+		td = document.createElement("td");
+		td.className = "labelContainer";
+		tr.appendChild(td);
+		this._monthSelect = document.createElement("select");
+	    for (var i = 0 ; i < this.monthNames.length ; i++) {
+	        var opt = document.createElement("option");
+	        opt.innerHTML = this.monthNames[i];
+	        opt.value = i;
+	        if (i == this.currentDate.getMonth()) {
+	            opt.selected = true;
+	        }
+	        this._monthSelect.appendChild(opt);
+	    }
+		td.appendChild(this._monthSelect);
+		
+
+		// 
+		// Create the year drop down
+		//
+		td = document.createElement("td");
+		td.className = "labelContainer";
+		tr.appendChild(td);
+		this._yearSelect = document.createElement("select");
+		for(var i=1920; i < 2050; ++i) {
+			var opt = document.createElement("option");
+			opt.innerHTML = i;
+			opt.value = i;
+			if (i == this.currentDate.getFullYear()) {
+				opt.selected = false;
+			}
+			this._yearSelect.appendChild(opt);
+		}
+		td.appendChild(this._yearSelect);
+		
+		
+		td = document.createElement("td");
+		td.className = "nextMonthButton";
+		this._nextMonth = document.createElement("button");
+		this._nextMonth.appendChild(document.createTextNode(">>"));
+		td.appendChild(this._nextMonth);
+		tr.appendChild(td);
+		
+		// Calendar body
+		div = document.createElement("div");
+		div.className = "calendarBody";
+		this._calDiv.appendChild(div);
+		this._table = div;
+		
+		// Create the inside of calendar body	
+		
+		var text;
+		table = document.createElement("table");
+		//table.style.width="100%";
+		table.className = "grid";
+	
+	    div.appendChild(table);
+		var thead = document.createElement("thead");
+		table.appendChild(thead);
+		tr = document.createElement("tr");
+		thead.appendChild(tr);
+		
+		for(i=0; i < 7; ++i) {
+			td = document.createElement("th");
+			text = document.createTextNode(this.shortWeekDayNames[(i+this.firstDayOfWeek)%7]);
+			td.appendChild(text);
+			td.className = "weekDayHead";
+			tr.appendChild(td);
+		}
+		
+		// Date grid
+		tbody = document.createElement("tbody");
+		table.appendChild(tbody);
+		
+		for(week=0; week<6; ++week) {
+			tr = document.createElement("tr");
+			tbody.appendChild(tr);
+
+		for(day=0; day<7; ++day) {
+				td = document.createElement("td");
+				td.className = "calendarDate";
+				text = document.createTextNode(String.fromCharCode(160));
+				td.appendChild(text);
+
+				tr.appendChild(td);
+				var tmp = new Object();
+				tmp.tag = "DATE";
+				tmp.value = -1;
+				tmp.data = text;
+				this.dateSlot[(week*7)+day] = tmp;
+				
+				Event.observe(td, "mouseover", this.hover.bind(this));
+				Event.observe(td, "mouseout", this.hover.bind(this));
+				
+			}
+		}
+		
+		// Calendar Footer
+		div = document.createElement("div");
+		div.className = "calendarFooter";
+		this._calDiv.appendChild(div);
+		
+		table = document.createElement("table");
+		//table.style.width="100%";
+		table.className = "footerTable";
+		//table.cellSpacing = 0;
+		div.appendChild(table);
+		
+		tbody = document.createElement("tbody");
+		table.appendChild(tbody);
+		
+		tr = document.createElement("tr");
+		tbody.appendChild(tr);
+
+		//
+		// The TODAY button	
+		//
+		td = document.createElement("td");
+		td.className = "todayButton";
+		this._todayButton = document.createElement("button");
+		var today = new Date();
+		var buttonText = today.getDate() + " " + this.monthNames[today.getMonth()] + ", " + today.getFullYear();
+		this._todayButton.appendChild(document.createTextNode(buttonText));
+		td.appendChild(this._todayButton);
+		tr.appendChild(td);
+		
+		//
+		// The CLEAR button
+		//
+		td = document.createElement("td");
+		td.className = "clearButton";
+		this._clearButton = document.createElement("button");
+		var today = new Date();
+		buttonText = "Clear";
+		this._clearButton.appendChild(document.createTextNode(buttonText));
+		td.appendChild(this._clearButton);
+		tr.appendChild(td);
+		
+		document.body.appendChild(this._calDiv);
+		
+		this.update();
+		this.updateHeader();
+		
+		return this._calDiv;
+	},
+	
+	hookEvents : function()
+	{
+		// IE55+ extension		
+		this._previousMonth.hideFocus = true;
+		this._nextMonth.hideFocus = true;
+		this._todayButton.hideFocus = true;
+		// end IE55+ extension
+		
+		// hook up events
+		Event.observe(this._previousMonth, "click", this.prevMonth.bind(this));
+		Event.observe(this._nextMonth, "click", this.nextMonth.bind(this));
+		Event.observe(this._todayButton, "click", this.selectToday.bind(this));
+		Event.observe(this._clearButton, "click", this.clearSelection.bind(this));
+		
+		Event.observe(this._monthSelect, "change", this.monthSelect.bind(this));
+		Event.observe(this._yearSelect, "change", this.yearSelect.bind(this));
+
+		// ie6 extension
+		Event.observe(this._calDiv, "mousewheel", this.mouseWheelChange.bind(this));		
+		
+		Event.observe(this._table, "click", this.selectDate.bind(this));
+		
+		Event.observe(this._calDiv,"keydown", this.keyPressed.bind(this)); 
+		
+		/*
+		this._calDiv.onkeydown = function (e) {
+			if (e == null) e = document.parentWindow.event;
+			var kc = e.keyCode != null ? e.keyCode : e.charCode;
+
+			if(kc == 13) {
+				var d = new Date(dp._currentDate).valueOf();
+				dp.setSelectedDate(d);
+
+				if (!dp._alwaysVisible && dp._hideOnSelect) {
+					dp.hide();
+				}
+				return false;
+			}
+				
+			
+			if (kc < 37 || kc > 40) return true;
+			
+			var d = new Date(dp._currentDate).valueOf();
+			if (kc == 37) // left
+				d -= 24 * 60 * 60 * 1000;
+			else if (kc == 39) // right
+				d += 24 * 60 * 60 * 1000;
+			else if (kc == 38) // up
+				d -= 7 * 24 * 60 * 60 * 1000;
+			else if (kc == 40) // down
+				d += 7 * 24 * 60 * 60 * 1000;
+
+			dp.setCurrentDate(new Date(d));
+			return false;
+		}*/
+		
+		
+	},
+	
+	keyPressed : function(ev)
+	{
+		if (!ev) ev = document.parentWindow.event;
+		var kc = ev.keyCode != null ? ev.keyCode : ev.charCode;
+		
+		if(kc = Event.KEY_RETURN)
+		{
+			//var d = new Date(this.currentDate);
+			this.setSelectedDate(this.currentDate);
+			this.hide();
+			return false;
+		}
+		
+		if(kc < 37 || kc > 40) return true;
+		
+		var d = new Date(this.currentDate).valueOf();
+		if(kc == Event.KEY_LEFT)
+			d -= 86400000; //-1 day
+		else if (kc == Event.KEY_RIGHT)
+			d += 86400000; //+1 day
+		else if (kc == Event.KEY_UP)
+			d -= 604800000; // -7 days
+		else if (kc == Event.KEY_DOWN)
+			d += 604800000; // +7 days
+		this.setCurrentDate(new Date(d));
+		return false;		
+	},
+	
+	selectDate : function(ev)
+	{
+		var el = Event.element(ev);
+		while (el.nodeType != 1)
+			el = el.parentNode;
+		
+		while (el != null && el.tagName && el.tagName.toLowerCase() != "td")
+			el = el.parentNode;
+			
+		// if no td found, return
+		if (el == null || el.tagName == null || el.tagName.toLowerCase() != "td")
+			return;
+			
+		var d = new Date(this.currentDate);
+		var n = Number(el.firstChild.data);
+		if (isNaN(n) || n <= 0 || n == null)
+			return;
+					
+		d.setDate(n);
+		this.setSelectedDate(d);
+		this.hide();
+	},
+	
+	selectToday : function()
+	{
+		this.setSelectedDate(new Date());
+		this.hide();
+	},
+	
+	clearSelection : function()
+	{
+		this.selectedDate = null;
+		if (isFunction(this.onchange))
+			this.onchange();
+		this.hide();
+	},
+	
+	monthSelect : function(ev)
+	{
+		this.setMonth(Form.Element.getValue(Event.element(ev)));
+	},
+	
+	yearSelect : function(ev)
+	{
+		this.setYear(Form.Element.getValue(Event.element(ev)));
+	},
+	
+	// ie6 extension
+	mouseWheelChange : function (e) 
+	{
+		if (e == null) e = document.parentWindow.event;
+		var n = - e.wheelDelta / 120;
+		var d = new Date(this.currentDate);
+		var m = this.getMonth() + n;
+		this.setMonth(m);
+		this.setCurrentDate(d);
+			
+		return false;
+	},
+
+	onchange : function() 
+	{
+		this.control.value = this.formatDate();
+	},
+	
+	formatDate : function()
+	{
+		return Prado.Calendar.Util.FormatDate(this.selectedDate, this.format);
+	},
+
+	setCurrentDate : function(date) 
+	{
+		if (date == null)
+			return;
+
+		// if string or number create a Date object
+		if (isString(date)  || isNumber(date))
+			date = new Date(date);
+	
+		// do not update if not really changed
+		if (this.currentDate.getDate() != date.getDate() ||
+			this.currentDate.getMonth() != date.getMonth() || 
+			this.currentDate.getFullYear() != date.getFullYear()) 
+		{
+		
+			this.currentDate = new Date(date);
+	
+			this.updateHeader();
+			this.update();
+		}
+	
+	},
+	
+	setSelectedDate : function(date) 
+	{
+		this.selectedDate = new Date(date);
+		this.setCurrentDate(this.selectedDate);
+		if (isFunction(this.onchange))
+			this.onchange();
+	},
+
+	getElement : function() 
+	{
+		return this._calDiv;
+	},
+
+	getSelectedDate : function () 
+	{
+		return isNull(this.selectedDate) ? null : new Date(this.selectedDate);
+	},
+	
+	setYear : function(year) 
+	{
+		var d = new Date(this.currentDate);
+		d.setFullYear(year);
+		this.setCurrentDate(d);
+	},
+
+	setMonth : function (month) 
+	{
+		var d = new Date(this.currentDate);
+		d.setMonth(month);
+		this.setCurrentDate(d);
+	},
+
+	nextMonth : function () 
+	{
+		this.setMonth(this.currentDate.getMonth()+1);
+	},
+
+	prevMonth : function () 
+	{
+		this.setMonth(this.currentDate.getMonth()-1);
+	},
+	
+	show : function() 
+	{
+		if(!this.showing)
+		{
+			var pos = Position.cumulativeOffset(this.control);
+			pos[1] += this.control.offsetHeight;
+			this._calDiv.style.display = "block";
+			this._calDiv.style.top = pos[1] + "px";
+			this._calDiv.style.left = pos[0] + "px";
+			Event.observe(document.body, "click", this.hideOnClick.bind(this));
+			var date = Prado.Calendar.Util.ParseDate(Form.Element.getValue(this.control), this.format);
+			if(!isNull(date))
+			{
+				this.selectedDate = date;
+				this.setCurrentDate(date);
+			}
+			this.showing = true;
+		}
+	},
+	
+	//hide the calendar when clicked outside any calendar
+	hideOnClick : function(ev)
+	{
+		if(!this.showing) return;
+		var el = Event.element(ev);
+		var within = false;
+		do
+		{
+			within = within || el.className == this.className;
+			within = within || el == this.trigger;
+			within = within || el == this.control;
+			if(within) break;
+			el = el.parentNode;			
+		}
+		while(el);
+		if(!within) this.hide();
+	},
+	
+	hide : function()
+	{
+		if(this.showing)
+		{
+			this._calDiv.style.display = "none";
+			this.showing = false;	
+			Event.stopObserving(document.body, "click", this.hideOnClick.bind(this));	
+		}	
+	},
+	
+	update : function() 
+	{
+		var Util = Prado.Calendar.Util;
+
+		// Calculate the number of days in the month for the selected date
+		var date = this.currentDate;
+		var today = Util.ISODate(new Date());
+		
+		var selected = isNull(this.selectedDate) ? "" : Util.ISODate(this.selectedDate);
+		var current = Util.ISODate(date);
+		var d1 = new Date(date.getFullYear(), date.getMonth(), 1);
+		var d2 = new Date(date.getFullYear(), date.getMonth()+1, 1);
+		var monthLength = Math.round((d2 - d1) / (24 * 60 * 60 * 1000));
+		
+		// Find out the weekDay index for the first of this month
+		var firstIndex = (d1.getDay() - this.firstDayOfWeek) % 7 ;
+	    if (firstIndex < 0)
+	    	firstIndex += 7;
+		
+		var index = 0;
+		while (index < firstIndex) {
+			this.dateSlot[index].value = -1;
+			this.dateSlot[index].data.data = String.fromCharCode(160);
+			this.dateSlot[index].data.parentNode.className = "empty";
+			index++;
+		}
+	        
+	    for (i = 1; i <= monthLength; i++, index++) {
+			var slot = this.dateSlot[index];
+			var slotNode = slot.data.parentNode;
+			slot.value = i;
+			slot.data.data = i;
+			slotNode.className = "date";
+			if (Util.ISODate(d1) == today) {
+				slotNode.className += " today";
+			}
+			if (Util.ISODate(d1) == current) {
+				slotNode.className += " current";
+			}
+			if (Util.ISODate(d1) == selected) {
+				slotNode.className += " selected";
+			}
+			d1 = new Date(d1.getFullYear(), d1.getMonth(), d1.getDate()+1);
+		}
+		
+		var lastDateIndex = index;
+	        
+	    while(index < 42) {
+			this.dateSlot[index].value = -1;
+			this.dateSlot[index].data.data = String.fromCharCode(160);
+			this.dateSlot[index].data.parentNode.className = "empty";
+			++index;
+		}
+		
+	},
+	
+	hover : function(ev)
+	{
+		//conditionally add the hover class to the event target element.
+		Element.condClassName(Event.element(ev), "hover", ev.type=="mouseover");	
+	},
+	
+	updateHeader : function () {
+
+		var options = this._monthSelect.options;
+		var m = this.currentDate.getMonth();
+		for(var i=0; i < options.length; ++i) {
+			options[i].selected = false;
+			if (options[i].value == m) {
+				options[i].selected = true;
+			}
+		}
+		
+		options = this._yearSelect.options;
+		var year = this.currentDate.getFullYear();
+		for(var i=0; i < options.length; ++i) {
+			options[i].selected = false;
+			if (options[i].value == year) {
+				options[i].selected = true;
+			}
+		}
+	
+	}
+	
+	
+};
\ No newline at end of file
-- 
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