/*
	*****************************************************************************************************
	Author : Lea Smart
	Source : www.totallysmartit.com
	Date : 7/3/2001
	DHTML Calendar
	Version 1.2
	
	You are free to use this code if you retain this header.
	You do not need to link to my site (be nice though!)
	
	Amendments
	22 Jan 2002; Added ns resize bug code; rewrote date functions into Date 'class';
				 Added support for yyyy-mm-dd date format
				 Added support for calendar beginning on any day
	7th Feb 2002 Fixed day highlight when year wasn't current year bug
	9th Jun 2002 Fixed bug with weekend colour
				 Amended the code for the date functions extensions.  Shortened addDays code considerably
	*****************************************************************************************************
	*/
	var timeoutDelay = 1000; // milliseconds, change this if you like, set to 0 for the calendar to never auto disappear
	var g_startDay = 0// 0=sunday, 1=monday
	
	// preload images
	var imgUp = new Image(7,13);
	imgUp.src = 'up.gif';
	var imgDown = new Image(7,13);
	imgDown.src = 'down.gif';
	
	// used by timeout auto hide functions
	var timeoutId = false;
	
	// the now standard browser sniffer class
	function Browser(){
	  this.dom = document.getElementById?1:0;
	  this.ie4 = (document.all && !this.dom)?1:0;
	  this.ns4 = (document.layers && !this.dom)?1:0;
	  this.ns6 = (this.dom && !document.all)?1:0;
	  this.ie5 = (this.dom && document.all)?1:0;
	  this.ok = this.dom || this.ie4 || this.ns4;
	  this.platform = navigator.platform;
	}
	var browser = new Browser();
		
	// dom browsers require this written to the HEAD section
	
	if (browser.dom || browser.ie4){
	    document.writeln('<style>');
		document.writeln('#container {');
		document.writeln('position : absolute;');
		document.writeln('left : 100px;');
		document.writeln('top : 100px;');
		document.writeln('width : 124px;');;
		browser.platform=='Win32'?height=140:height=145;
		document.writeln('height : ' + height +'px;');
		document.writeln('clip:rect(0px 124px ' + height + 'px 0px);');
		//document.writeln('overflow : hidden;');
		document.writeln('visibility : hidden;');
		document.writeln('background-color : #ffffff');
		document.writeln('}');
		document.writeln('</style>')
		document.write('<div id="container"');
		if (timeoutDelay) document.write(' onmouseout="calendarTimeout();" onmouseover="if (timeoutId) clearTimeout(timeoutId);"');
		document.write('></div>');
	}
	
	var g_Calendar;  // global to hold the calendar reference, set by constructor
	
	function calendarTimeout(){
	  if (browser.ie4 || browser.ie5){
	    if (window.event.srcElement && window.event.srcElement.name!='month') timeoutId=setTimeout('g_Calendar.hide();',timeoutDelay);
	  }
	  if (browser.ns6 || browser.ns4){
	    timeoutId=setTimeout('g_Calendar.hide();',timeoutDelay);
	  }
	}
	function validateUSDate( strValue ) {
/************************************************
DESCRIPTION: Validates that a string contains only 
    valid dates with 2 digit month, 2 digit day, 
    4 digit year. Date separator can be ., -, or /.
    Uses combination of regular expressions and 
    string parsing to validate date.
    Ex. mm/dd/yyyy or mm-dd-yyyy or mm.dd.yyyy or mm.dd.yy
    
PARAMETERS:
   strValue - String to be tested for validity
   
RETURNS:
   True if valid, otherwise false.
   
REMARKS:
   Avoids some of the limitations of the Date.parse()
   method such as the date separator character.
*************************************************/
  var objRegExp = /^\d{1,2}(\/)\d{1,2}\1\d{2,4}$/
 //var objRegExp = /^\d{1,2}(\-|\/|\.)\d{1,2}\1\d{2,4}$/
 
  //check to see if in correct format
  if(!objRegExp.test(strValue))
    return false; //doesn't match pattern, bad date
  else{
    var arrayDate = strValue.split(RegExp.$1); //split date into month, day, year
	var intDay = parseInt(arrayDate[1],10); 
	var intYear = parseInt(arrayDate[2],10);
    var intMonth = parseInt(arrayDate[0],10);
	
	//check for valid month
	if(intMonth > 12 || intMonth < 1) {
		return false;
	}
	
    //create a lookup for months not equal to Feb.
    var arrayLookup = { '01' : 31,'03' : 31, '04' : 30,'05' : 31,'06' : 30,'07' : 31,
                        '08' : 31,'09' : 30,'10' : 31,'11' : 30,'12' : 31,
                        '1' : 31, '3' : 31, '4' : 30, '5' : 31, '6' : 30, '7' : 31,
                        '8' : 31, '9' : 30}
  
    //check if month value and day value agree
    if(arrayLookup[arrayDate[0]] != null) {
      if(intDay <= arrayLookup[arrayDate[0]] && intDay != 0)
        return true; //found in lookup table, good date
    }
		
    //check for February
	var booLeapYear = (intYear % 4 == 0 && (intYear % 100 != 0 || intYear % 400 == 0));
    if( ((booLeapYear && intDay <= 29) || (!booLeapYear && intDay <=28)) && intDay !=0)
      return true; //Feb. had valid number of days
  }
  return false; //any other values, bad date
}
	// constructor for calendar class
	function Calendar(){
	  g_Calendar = this;
	  // some constants needed throughout the program
	  this.daysOfWeek = new Array("Su","Mo","Tu","We","Th","Fr","Sa");
	  this.months = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
	  this.daysInMonth = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	  
	  if (browser.ns4){
	    var tmpLayer = new Layer(127);
		if (timeoutDelay){
		  tmpLayer.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
		  tmpLayer.onmouseover = function(event) { if (timeoutId) clearTimeout(timeoutId); };
		  tmpLayer.onmouseout = function(event) { timeoutId=setTimeout('g_Calendar.hide()',timeoutDelay);};
		}
	    tmpLayer.x = 100;
	    tmpLayer.y = 100;
	    tmpLayer.bgColor = "#ffffff";
	  }
	  if (browser.dom || browser.ie4){
		var tmpLayer = browser.dom?document.getElementById('container'):document.all.container;
	  }
	  this.containerLayer = tmpLayer;
	  if (browser.ns4 && browser.platform=='Win32') {
	    this.containerLayer.clip.height=134;
	    this.containerLayer.clip.width=127;
	  }

	}
	
 	Calendar.prototype.getFirstDOM = function() {
		var thedate = new Date();
		thedate.setDate(1);
		thedate.setMonth(this.month);
		thedate.setFullYear(this.year);
		return thedate.getDay();
	}

	Calendar.prototype.getDaysInMonth = function (){
	   if (this.month!=1) {
	   return this.daysInMonth[this.month]
	   }
	   else {
	     // is it a leap year
		    if (Date.isLeapYear(this.year)) {
			  return 29;
			}
		    else {
			  return 28;
			}
	   }
	}
	 
	Calendar.prototype.buildString = function(){
	  var tmpStr = '<form onSubmit="this.year.blur();return false;"><table width="100%" border="0" cellspacing="0" cellpadding="2" class="calBorderColor"><tr><td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
	  tmpStr += '<tr>';
	  tmpStr += '<td width="60%" class="cal" align="left">';
	  if (this.hasDropDown) {
	    tmpStr += '<select class="month" name="month" onchange="g_Calendar.selectChange();">';
		for (var i=0;i<this.months.length;i++){
	      tmpStr += '<option value="' + i + '"' 
		  if (i == this.month) tmpStr += ' selected';
		  tmpStr += '>' + this.months[i] + '</option>';
	    }
	    tmpStr += '</select>';
	  } else {
	    tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td align="center"><a href="javascript: g_Calendar.changeMonth(-1);"><img name="calendar" src="' + 'images/down.gif" width="7" height="13" border="0" alt=""></a></td><td class="cal1" width="100%" align="center">' + this.months[this.month] + '</td><td class="cal" align="center"><a href="javascript: g_Calendar.changeMonth(+1);"><img name="calendar" src="' + 'images/up.gif" width="7" height="13" border="0" alt=""></a></td></tr></table>';
	  }
	  tmpStr += '</td>';
	  /* observation : for some reason if the below event is changed to 'onChange' rather than 'onBlur' it totally crashes IE (4 and 5)!
	  */
	  tmpStr += '<td width="40%" align="right" class="cal">';
	  
	  if (this.hasDropDown) { 
	    tmpStr += '<input class="year" type="text" size="';
	    // get round NS4 win32 lenght of year input problem
	    (browser.ns4 && browser.platform=='Win32')?tmpStr += 1:tmpStr += 4;
	  tmpStr += '" name="year" maxlength="4" onBlur="g_Calendar.inputChange();" value="' + this.year + '">';
	  } else {
	  tmpStr += '<table border="0" cellspacing="0" cellpadding="0"><tr><td class="cal"><a href="javascript: g_Calendar.changeYear(-1);"><img name="calendar" src="'+ 'images/down.gif" width="7" height="13" border="0" alt=""></a></td><td class="cal1" width="100%" align="center">' + this.year + '</td><td class="cal"><a href="javascript: g_Calendar.changeYear(+1);"><img name="calendar" src="'+ 'images/up.gif" width="7" height="13" border="0" alt=""></a></td></tr></table>'
	  }
	  tmpStr += '</td>';
	  tmpStr += '</tr>';
	  tmpStr += '</table>';
	  var iCount = 1;

	  var iFirstDOM = (7+this.getFirstDOM()-g_startDay)%7; // to prevent calling it in a loop

	  var iDaysInMonth = this.getDaysInMonth(); // to prevent calling it in a loop
	  
	  tmpStr += '<table width="100%" border="0" cellspacing="0" cellpadding="1" class="calBgColor">';
	  tmpStr += '<tr>';
	    for (var i=0;i<7;i++){
		  tmpStr += '<td align="center" class="calDaysColor">' + this.daysOfWeek[(g_startDay+i)%7] + '</td>';
		}
	  tmpStr += '</tr>';
	  var tmpFrom = parseInt('' + this.dateFromYear + this.dateFromMonth + this.dateFromDay,10);
	  var tmpTo = parseInt('' + this.dateToYear + this.dateToMonth + this.dateToDay,10);
	  var tmpCompare;
	  for (var j=1;j<=6;j++){
	     tmpStr += '<tr>';
	     for (var i=1;i<=7;i++){
		   tmpStr += '<td width="16" align="center" '
		   if ( (7*(j-1) + i)>=iFirstDOM+1  && iCount <= iDaysInMonth){
		     if (iCount==this.day && this.year==this.oYear && this.month==this.oMonth) tmpStr += 'class="calHighlightColor"';
			 else {
			    if (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"';
				else tmpStr += 'class="cal"';
			 }
		     tmpStr += '>';
			 /* could create a date object here and compare that but probably more efficient to convert to a number
			   and compare number as numbers are primitives */
			 tmpCompare = parseInt('' + this.year + padZero(this.month) + padZero(iCount),10);
			 if (tmpCompare >= tmpFrom && tmpCompare <= tmpTo) {
			   tmpStr += '<a class="cal" href="javascript: g_Calendar.clickDay(' + iCount + ');">' + iCount + '</a>';
			 } else {
 tmpStr += '<a class="cal" href="javascript: g_Calendar.clickDay(' + iCount + ');">' + iCount + '</a>';
			 }
			 iCount++;
		   } else {
		     if  (i==7-g_startDay || i==((7-g_startDay)%7)+1) tmpStr += 'class="calWeekend"'; else tmpStr +='class="cal"';
			 tmpStr += '>&nbsp;';
		   }
		   tmpStr += '</td>'
		 }
		 tmpStr += '</tr>'
	  }
	  tmpStr += '</table></td></tr></table></form>'
	  return tmpStr;
	}
	
	Calendar.prototype.selectChange = function(){
	  this.month = browser.ns6?this.containerLayer.ownerDocument.forms[0].month.selectedIndex:this.containerLayer.document.forms[0].month.selectedIndex;
	  this.writeString(this.buildString());
	}
	
	Calendar.prototype.inputChange = function(){
	  var tmp = browser.ns6?this.containerLayer.ownerDocument.forms[0].year:this.containerLayer.document.forms[0].year;
	  if (tmp.value >=1900 || tmp.value <=2100){
	    this.year = tmp.value;
	    this.writeString(this.buildString());
	  } else {
	    tmp.value = this.year;
	  }
	}
	Calendar.prototype.changeYear = function(incr){
	   (incr==1)?this.year++:this.year--;
	   this.writeString(this.buildString());
	}
	Calendar.prototype.changeMonth = function(incr){
	    if (this.month==11 && incr==1){
	      this.month = 0;
	  	  this.year++;
	    } else {
	      if (this.month==0 && incr==-1){
	        this.month = 11;
		    this.year--;
	      } else {
		    (incr==1)?this.month++:this.month--;
		  }
		}
		this.writeString(this.buildString());
	}
	
	Calendar.prototype.clickDay = function(day){
	   var tmp = eval('document.' + this.target);
	   if (this.dateFormat=='dd-mmm-yyyy' || this.dateFormat=='dd/mmm/yyyy') tmp.value = day + this.dateDelim + this.months[this.month].substr(0,3) + this.dateDelim + this.year;
	   if (this.dateFormat=='dd/mm/yyyy' || this.dateFormat=='dd-mm-yyyy') tmp.value = day + this.dateDelim + (this.month+1) + this.dateDelim + this.year;
	   if (this.dateFormat=='mm/dd/yyyy' || this.dateFormat=='mm-dd-yyyy') tmp.value = (this.month+1) + this.dateDelim + day + this.dateDelim + this.year;
	   if (this.dateFormat=='yyyy-mm-dd') tmp.value = this.year + this.dateDelim + (this.month+1) + this.dateDelim + day;
	   
	    if (browser.ns4) this.containerLayer.hidden=true;
	    if (browser.dom || browser.ie4){
	      this.containerLayer.style.visibility='hidden'
	    }
	}
	
	Calendar.prototype.writeString = function(str){
	  if (browser.ns4){
	    this.containerLayer.document.open();
	    this.containerLayer.document.write(str);
	    this.containerLayer.document.close();
	  } 
	  if (browser.dom || browser.ie4){
	    this.containerLayer.innerHTML = str;
	  }
	}
	
	Calendar.prototype.show = function(event, target, bHasDropDown, dateFormat, dateFrom, dateTo){
	// calendar can restrict choices between 2 dates, if however no restrictions
	// are made, let them choose any date between 1900 and 3000
	if (dateFrom) this.dateFrom = dateFrom; else this.dateFrom = new Date(1900,0,1);
	this.dateFromDay = padZero(this.dateFrom.getDate());
	this.dateFromMonth = padZero(this.dateFrom.getMonth());
	this.dateFromYear = this.dateFrom.getFullYear();
	if (dateTo) this.dateTo = dateTo; else this.dateTo = new Date(3000,0,1);
	this.dateToDay = padZero(this.dateTo.getDate());
	this.dateToMonth = padZero(this.dateTo.getMonth());
	this.dateToYear = this.dateTo.getFullYear();
	this.hasDropDown = bHasDropDown;
	if (dateFormat) this.dateFormat = dateFormat; else this.dateFormat = 'dd-mmm-yyyy';
	switch (this.dateFormat){
	  case 'dd-mmm-yyyy':
	  case 'dd-mm-yyyy':
	  case 'yyyy-mm-dd':
	    this.dateDelim = '-';
		break;
	  case 'dd/mm/yyyy':
	  case 'mm/dd/yyyy':
	  case 'dd/mmm/yyyy':
	    this.dateDelim = '/';
		break;
	}
	
	  if (browser.ns4) {
	    if (!this.containerLayer.hidden) {
		  this.containerLayer.hidden=true;
		  return;
		}
	   }
	  if (browser.dom || browser.ie4){
	    if (this.containerLayer.style.visibility=='visible') {
		  this.containerLayer.style.visibility='hidden';
		  return;
		}  
	  }

	  if (browser.ie5 || browser.ie4){
	    var event = window.event;
	  }
	  if (browser.ns4){
	    this.containerLayer.x = event.x+10;
	    this.containerLayer.y = event.y-5;
	  }
	  if (browser.ie5 || browser.ie4){
	    var obj = event.srcElement;
 	    x = 0;
  		while (obj.offsetParent != null) {
    		  x += obj.offsetLeft;
    		  obj = obj.offsetParent;
  		}
  		x += obj.offsetLeft;
	    y = 0;
		var obj = event.srcElement;
	    while (obj.offsetParent != null) {
    		  y += obj.offsetTop;
    		  obj = obj.offsetParent;
  		}
  		y += obj.offsetTop;
		
        this.containerLayer.style.left = x+35;
		if (event.y>0)this.containerLayer.style.top = y;
	  }
	  if (browser.ns6){
	    this.containerLayer.style.left = event.pageX+10;
		this.containerLayer.style.top = event.pageY-5;
	  }
	  this.target = target;
	  var tmp = eval('document.' + this.target);
	  if (tmp && tmp.value && tmp.value.split(this.dateDelim).length==3 && tmp.value.indexOf('d')==-1){
	    var atmp = tmp.value.split(this.dateDelim)
		switch (this.dateFormat){
		 case 'dd-mmm-yyyy':
		 case 'dd/mmm/yyyy':
		   for (var i=0;i<this.months.length;i++){
		     if (atmp[1].toLowerCase()==this.months[i].substr(0,3).toLowerCase()){
		       this.month = this.oMonth = i;
			   break;
		     }
		   }
		   this.day = parseInt(atmp[0],10);
		   this.year = this.oYear = parseInt(atmp[2],10);
		   break;
		 case 'dd/mm/yyyy':
		 case 'dd-mm-yyyy':
		   this.month = this.oMonth = parseInt(atmp[1]-1,10); 
		   this.day = parseInt(atmp[0],10);
		   this.year = this.oYear = parseInt(atmp[2],10);
		   break;
		 case 'mm/dd/yyyy':
		 case 'mm-dd-yyyy':
		   this.month = this.oMonth = parseInt(atmp[0]-1,10);
		   this.day = parseInt(atmp[1],10);
		   this.year = this.oYear = parseInt(atmp[2],10);
		   break;
		 case 'yyyy-mm-dd':
		   this.month = this.oMonth = parseInt(atmp[1]-1,10);
		   this.day = parseInt(atmp[2],10);
		   this.year = this.oYear = parseInt(atmp[0],10);
		   break;
		}
	  } else { // no date set, default to today
	    var theDate = new Date();
	  	 this.year = this.oYear = theDate.getFullYear();
	     this.month = this.oMonth = theDate.getMonth();
	     this.day = this.oDay = theDate.getDate();
	  }
	  this.writeString(this.buildString());
	  
	  // and then show it!
	   if (browser.ns4) {
	   this.containerLayer.hidden=false;
	   }
	  if (browser.dom || browser.ie4){
	      this.containerLayer.style.visibility='visible';
	  }
	}
	
	Calendar.prototype.hide = function(){
	  if (browser.ns4) this.containerLayer.hidden = true;
	  if (browser.dom || browser.ie4){
	    this.containerLayer.style.visibility='hidden';
	  }
	}
	
	function handleDocumentClick(e){
	  if (browser.ie4 || browser.ie5) e = window.event;

	  if (browser.ns6){
	    var bTest = (e.pageX > parseInt(g_Calendar.containerLayer.style.left,10) && e.pageX <  (parseInt(g_Calendar.containerLayer.style.left,10)+125) && e.pageY < (parseInt(g_Calendar.containerLayer.style.top,10)+125) && e.pageY > parseInt(g_Calendar.containerLayer.style.top,10));
	    if (e.target.name!='imgCalendar' && e.target.name!='month'  && e.target.name!='year' && e.target.name!='calendar' && !bTest){
		  g_Calendar.hide(); 
		}
	  }
	  if (browser.ie4 || browser.ie5){
		// extra test to see if user clicked inside the calendar but not on a valid date, we don't want it to disappear in this case
	   var bTest = (e.x > parseInt(g_Calendar.containerLayer.style.left,0) && e.x <  (parseInt(g_Calendar.containerLayer.style.left,0)+125) && e.y < (parseInt(g_Calendar.containerLayer.style.top,0)+125) && e.y > parseInt(g_Calendar.containerLayer.style.top,0));
	    if (e.srcElement.name!='imgCalendar' && e.srcElement.name!='month' && e.srcElement.name!='year' && !bTest & typeof(e.srcElement)!='object'){
		  g_Calendar.hide(); 
		}
	  }
	  if (browser.ns4) g_Calendar.hide();
	}
	
	// utility function
	function padZero(num) {
	  return ((num <= 9) ? ("0" + num) : num);
	}
	  // Finally licked extending  native date object;
	  Date.isLeapYear = function(year){ if (year%4==0 && ((year%100!=0) || (year%400==0))) return true; else return false; }
	  Date.daysInYear = function(year){ if (Date.isLeapYear(year)) return 366; else return 365;}
	  var DAY = 1000*60*60*24;
	  Date.prototype.addDays = function(num){
		return new Date((num*DAY)+this.valueOf());
	  }	
	  
	 // events capturing, careful you don't override this by setting something in the onload event of 
	// the body tag
	window.onload=function(){ 
	  new Calendar(new Date());
	  if (browser.ns4){
	    if (typeof document.NSfix == 'undefined'){
		  document.NSfix = new Object();
	      document.NSfix.initWidth=window.innerWidth;
		  document.NSfix.initHeight=window.innerHeight;
		}
	  }
	}
	if (browser.ns4) window.onresize = function(){
	  if (document.NSfix.initWidth!=window.innerWidth || document.NSfix.initHeight!=window.innerHeight) window.location.reload(false);
	} // ns4 resize bug workaround
	window.document.onclick=handleDocumentClick;
    window.onerror = function(msg,url,line){
	  //alert('******* an error has occurred ********' +
	  //'\n\nIt appears that you may have tried to click or type something before the ' 
	  //+ 'page finished loading.  If you experience any problems with the calendars'
	  //+ ', the best course of action would be to refresh this page and wait for it '
	  //+ 'to finish loading.\nIf you continue to see this error, please contact us at '
	  //+ 'support@hotelscheap.org and we will do our best to assist you.');
//	  '\n\nPlease check that' + 
//	  '\n\n1)You have not added any code to the body onload event,'
//	  +  '\nif you want to run something as well as the calendar initialisation'
//	  + '\ncode, add it to the onload event in the calendar library.'
//	  + '\n\n2)You have set the parameters correctly in the g_Calendar.show() method '
//	  + '\n\nSee www.totallysmartit.com\\examples\\calendar\\simple.asp for examples'
//	  + '\n\n------------------------------------------------------'
//	  + '\nError details'
//	  + '\nText:' + msg + '\nurl:' + url + '\nline:' + line);
	}