//CALENDAR
var n=navigator,B=(n.userAgent+n.appName).toLowerCase(),V=parseInt(n.appVersion);
var N4=(B.indexOf("netscape")!=-1&&V==4),IE=(B.indexOf("microsoft")!=-1);

var calForm;
var dropDay1,dropMonth1
var dropDay2,dropMonth2;
var currButtonNo;

var initDay,initMonth,initYear;
var endDay,endMonth;
var numMonths;

var calWidth=142;
var calHeight=182;

var UILayerOffsetX = 150;
var UILayerOffsetY = 75;

var bPressed,calendar;
var calendarHTML="";
var monthNames=new Array("x","x","x","x","x","x","x","x","x","x","x","x");//placeholders
//var monthNames=localised_months
if(!N4)document.onmouseup=function(e){
	if (calendar!=null){
	calendar.hide();
		}
	if(bPressed){
		bPressed=false;
		showCalendar(e);}
	
}

function startUpCalendar(stDate,endDate,formName,dd1,dm1,dd2,dm2,sync){
	if(N4)return;
	if(!document.all)document.all=document.getElementsByTagName("*");
	calForm=document.forms[formName];
	dropDay1=calForm[dd1];dropMonth1=calForm[dm1];
	//dropDay2=calForm[dd2];dropMonth2=calForm[dm2];

	calendar=new LayerFrame('cIframe');
	stPos=currpos=0;

	initDate=stDate.split('/');
	initDay=initDate[0]*1,initMonth=initDate[1]*1,initYear=initDate[2];
	endDate=endDate.split('/');
	endDay=endDate[0]*1,endMonth=endDate[1]*1;
	if(endMonth>initMonth)
		numMonths=endMonth-initMonth+1;
	else 
		numMonths=(12-initMonth)+endMonth+1;
	if(endMonth==initMonth)
		numMonths=1;
	if (sync!=false){
  		if(dropMonth1) 
  			if(dropDay1.options[0].value!="0"){
  				setDropdowns(initDay,initMonth,1);
	  			//if(dropMonth2){setDropdowns(initDay,initMonth,2);currButtonNo=1;syncDropdowns();}
  			}
	}
}

function setCalendar(buttonNo){
	bPressed=true;
	currButtonNo=buttonNo;

	var ops=eval('dropMonth'+buttonNo);	
	for(i=0;i<ops.length;i++){
		var opVal=ops.options[i].value;
		monthNames[opVal]=ops.options[i].text;
	}

	var currMonth=getChronMonth(eval('dropMonth'+buttonNo).value*1);
	currpos=calHeight*currMonth;

	getCalendarHTML();
	var cIframe=frames['cIframe'];
	cIframe.document.write(calendarHTML);
	cIframe.document.close();
}

function showCalendar(e){
	var button=new posElement((IE)?event.srcElement:e.target);
	posX=button.x;posY=button.y;
	doc_height=document.body.clientHeight+(IE?document.body.scrollTop:0);
	if(posY>doc_height-calHeight)calendar.show(posX+36,posY-calHeight+20);
	else calendar.show(posX+36,posY);		
}



function posElement(element){
    this.x=(element.offsetLeft - UILayerOffsetX);
    this.y=(element.offsetTop - UILayerOffsetY);
    var pElement=element.offsetParent;
    while(pElement && pElement.id!='master_center'){
        this.x+=pElement.offsetLeft;
        this.y+=pElement.offsetTop;
        pElement=pElement.offsetParent;}
}

function LayerFrame(id){
	this.style=eval('document.all.'+id).style;
	this.reset=cReset;
	this.show=function(x,y){cReset();this.style.left=x+"px";this.style.top=y+"px";this.style.position="absolute";}
	this.hide=function(){this.style.top="-2000px";}
	this.next=scrollDown;
	this.previous=scrollUp;
}

function cReset(){
	//cIframe.scroll(0,stPos);currpos=stPos;
	cIframe.scroll(0,0);//keep state
}

function scrollDown(){
	currpos+=calHeight;
	cIframe.scroll(0,currpos);
}

function scrollUp(){
	currpos-=calHeight;
	if(currpos>0)cIframe.scroll(0,currpos);
	else{currpos=stPos;calendar.reset();}
}

function displayDate(dt){
	calendar.hide();

	var DMY=dt.split("/");
	var day=DMY[0];
	var month=DMY[1];

	setDropdowns(day,month,currButtonNo);
	//if(dropDay2)syncDropdowns();
	//new code to update check out date 
	if (formReference.selectedNumNights){updateCheckOut(formReference.selectedNumNights.value);}

}

function syncDropdowns(){
	var d1=dropDay1.value*1;
	var d2=dropDay2.value*1;
	var m1=dropMonth1.value*1;
	var m2=dropMonth2.value*1;
	var cm1=getChronMonth(m1),cm2=getChronMonth(m2);

	if(cm1>cm2||(cm1==cm2&&d1>=d2)){
	var tg,setDay,setMonth;
		if(currButtonNo==1){
			setDay=d1+1;setMonth=m1;
			if(!hasOptionVal(dropDay1,setDay)){setMonth+=1;if(setMonth>12)setMonth=1;setDay=1;}
			if(m1==endMonth&&d1==endDay){setMonth=m1;setDay=d1;}
		setDropdowns(setDay,setMonth,2);
		}
	if(currButtonNo==2){
			setDay=d2;setMonth=m2;
		setDropdowns(setDay,setMonth,1);
		}
	}
}

function setDropdowns(dv,mv,bn){
	var drDay=eval("dropDay"+bn);
	var drMonth=eval("dropMonth"+bn);
		selOptionVal(drMonth,mv);
		setDays(bn);
		selOptionVal(drDay,dv);
}

function selOptionVal(ob,val){
	var ops=new Object();
	var objVal;
	for(var i=0;i<ob.length;i++)
	{
        objVal = ob[i].value;
        if(objVal.charAt(0) == 0)
        {
	       objVal = objVal.substring(1);   
        }

		if(objVal==val)
	    {
	        ob[i].selected=true;
	        return;
		}
	}
}

function hasOptionVal(ob,val){
	var ops=new Object();
	for(var i=0;i<ob.length;i++)ops[ob[i].value]=ob[i];
	if(ops[val])return true;
	else return false;
}

function getChronMonth(month){
	var cM=month-initMonth;
	return (cM<0)?cM+12:cM;
}

function getCalendarHTML(){
	calendarHTML="";
	var currDate=new Date(Date.UTC(initYear,initMonth-1,initDay));//yyyy/mm from 0/d from 1
	//alert("style sheet is "+masterStyle);
	calendarHTML+='<html><head><title>Calendar</title>';
	calendarHTML+=masterStyle;
	calendarHTML+='<style type="text/css">\
		body{font-family:Verdana,sans-serif;font-size:13px;}\
		a{text-decoration:none;}\
		a:hover{text-decoration:underline;}\
		td{font-family:Verdana,Helvetica,sans-serif;font-size:10px;text-align:center;color:#cccccc}\
		td a{color:#000000;}\
		b{color:#000000;}\
		.white{color:#FFFFFF;font-weight:bold;}\
		</style></head><body bgcolor="#000000" leftmargin="1" topmargin="1">'
	
	for(i=1;i<=numMonths;i++){//For each month

		var month=currDate.getMonth()+1;//mm is from 0
		var numDays=getNumDays(month);
		var year=currDate.getYear();if(year<2000)year+=1900;

		currDate.setDate(1);//set to first of the month and get day of the week
		var firstDay=currDate.getDay()-1;//Sun is 0 from getDay() but we run from Mon
		if(firstDay<0)firstDay=6;
        var monthNumber ; // this variable will hold month with zero prefix till 9th month like 01,02,...,09 and then 10,11,12.
		if(currDate.getMonth() < 9)	{		
			monthNumber ='0'+ eval(currDate.getMonth()+1);
		}
        else{		
			monthNumber = currDate.getMonth()+1;
		}
	//Compile HTML
		var monthHTML='\
			<table border="0" cellspacing="0" cellpadding="0" height="180" width="140" bgcolor="#FFFFFF">\
			<tr><td height="20" width="15" class="background_brand">';
		if(i>1)
			monthHTML+='<a href="javascript:top.calendar.previous()"><img src="http://cdn.lastminute.com/site/ico_cal_arrow_left.gif" hspace="2" width="15" height="13" border="0"></a>';
		else
			monthHTML+='<img src="http://www.lastminute.com/lmn/calendar/images/trans.gif" width="20" height="13" border="0">';

			monthHTML+='</td><td colspan="5" width="100" class="white background_brand">'+ monthNames[monthNumber] +
			' ' + year + '</td><td class="background_brand" width="20">';
			
		if(i<numMonths)
			monthHTML+='<a href="javascript:top.calendar.next()"><img src="http://cdn.lastminute.com/site/ico_cal_arrow_right.gif" hspace="2" width="15" height="13" border="0"></a>';
		else
			monthHTML+='<img src="http://www.lastminute.com/lmn/calendar/images/trans.gif" width="15" height="13" border="0">';

			monthHTML+='</td></tr><tr><td height="20" width="20"><b>' + monday_initial + '</b></td><td width="20"><b>' +
			tuesday_initial + '</b></td><td width="20"><b>' + wednesday_initial + '</b></td><td width="20"><b>' +
			thursday_initial + '</b></td><td width="20"><b>' + friday_initial + '</b></td><td width="20"><b>' +
			saturday_initial + '</b></td><td width="20"><b>' + sunday_initial + '</b></td></tr>';

		for(j=0;j<42;j+=7){//for 6 week slots in month

			monthHTML+='<tr>';

			for(k=1;k<8;k++){//for each day of week

				var slotNo=j+k;
				var countFromFirstDay=slotNo-firstDay;
				var isLink=(slotNo>firstDay)&&(countFromFirstDay<=numDays);
				var preDays=(month==initMonth&&countFromFirstDay<initDay);
				if(currButtonNo==2){
					var M=dropMonth1.value*1,D=dropDay1.value*1;
					var M1=getChronMonth(M),cM=getChronMonth(month);
					preDays=(cM<M1)||(cM==M1&&countFromFirstDay<D);}
				var postDays=(month==endMonth&&countFromFirstDay>endDay);
				var dateToShow=(isLink)?countFromFirstDay:'';

			//compile displayDate('dd/mm/yyyy') argument for link
				var dateDay=countFromFirstDay;
				var dateMonth=currDate.getMonth()+1;
				var dateYear=currDate.getYear();
				var dateString=dateDay+"/"+dateMonth+"/"+dateYear;

			//Write table cell with link
				monthHTML+='<td height="20">';
				if(isLink&&!preDays&&!postDays)
				monthHTML+='<a href="javascript:top.displayDate(\''+dateString+'\')">';
				monthHTML+=dateToShow;
				if(isLink&&!preDays&&!postDays)
				monthHTML+='</a>';
				monthHTML+='</td>';
			}
			monthHTML+='</tr>';
		}
			monthHTML+='\
			<tr><td height="20" class="background_brand">&nbsp;</td>\
			<td colspan="5" class="background_brand"><a href="javascript:top.calendar.hide()" class="white">Close</a></td>\
			<td class="white background_brand">&nbsp;</td></tr>\
			<tr><td colspan="7" bgcolor="#000000"><img src="http://www.lastminute.com/lmn/calendar/images/trans.gif" width="140" height="2"></td></tr></table>'
	
		calendarHTML+=monthHTML+'</body></html>';

		currDate.setMonth(currDate.getMonth()+1);
	}
}

function getNumDays(M){
	if(M==2){
		var febYear=(initMonth<=2)?initYear:initYear*1+1;
		var febDate=new Date(Date.UTC(febYear,1,29));//yyyy/mm from 0/d from 1
		return (febDate.getMonth()==1)?29:28;
	}
	else return (M==9||M==4||M==6||M==11)?30:31;
}

//DROPDOWNS--
function setDays(buttonNo){
	if(N4)return;
	var D=eval("dropDay"+buttonNo).value*1;
	var M=eval("dropMonth"+buttonNo).value*1;
	var daysDD=eval("dropDay"+buttonNo);
  if (daysDD.options[0].value=="0"){
     daysDD.length=1;
     for(i=1;i<getNumDays(M)+1;i++)daysDD.options[i]=new Option(i+1,i+1);
  } else {
     daysDD.length=0;
     for(i=0;i<getNumDays(M);i++)daysDD.options[i]=new Option(i+1,i+1);
  }
	if(hasOptionVal(daysDD,D))selOptionVal(daysDD,D);//keep day selected
	else daysDD[0].selected=true;//or set to first
}

function setDates(buttonNo){//onchange from month dropdown
	if(N4)return;
	setDays(buttonNo);
	currButtonNo=buttonNo;
	if(dropDay2)syncDropdowns();
}