function isValidHotel(formName,obDate,ibDate)
{
	
	var CHD=document.forms[""+formName].chdroom1.value;
    var ADT=document.forms[""+formName].adt1.value;
    var totPax=parseInt(ADT)+parseInt(CHD);
	var isvalidD=isDate(obDate)
	var isvalidR=isDate(ibDate)
	if(!isvalidD || !isvalidR){
	return false;
	}
	var obDate=obDate.split('/');
	var ibDate=ibDate.split('/');
	var obDay=obDate[0];
	var obYear=obDate[2];
	var obMonth=(obDate[1]-1)
	var ibDay=ibDate[0];
	var ibYear=ibDate[2];
	var ibMonth=(ibDate[1]-1)
	var today=new Date();
	var D=today.getDate();if(D<10){D="0"+D;}
	var M=today.getMonth();if(M<10){M="0"+M;}
	var Y=today.getFullYear();
	var objDiff=daysElapsed(new Date(ibYear,ibMonth,ibDay),new Date(obYear,obMonth,obDay));
	var objDt=daysElapsed(new Date(obYear,obMonth,obDay),new Date(Y,M,D));
	
	if(objDt<0){
		alert("Depart date can't be in past")
		return false;
	}
	if(document.forms[""+formName].cityname.value=="" && document.forms[""+formName].cityname[8].checked)
	{
		alert("City name can't be blank"); 
		return false;
	}
	if(objDiff<0)
	{
		alert("Checkout date must occur after the Checkin date.")
		return false;
	}
	if(objDiff>14)
	{
		alert("Your stay period can not be more than a fortnight for online hotel booking. \n If your stay period is more than this, please call our call center.")
		return false;
	}
	 if(objDiff==0)
        {
                alert("Checkout and Checkin date can't be same.")
                return false;
        }
	if((totPax>3)&&(document.forms[""+formName].adt1_chdage1.value>4) && (document.forms[""+formName].adt1_chdage2.value>4)){
        alert("You are allowed a maximum of 3 guests per booking online.\n If your booking is larger than this , please call our call centre.")
        return false;
        }
	
	if(document.forms[""+formName].chdroom1.value=="1" && document.forms[""+formName].adt1_chdage1.value=="")
        {
                alert("please enter the child age");
                return false;
        }
	if(document.forms[""+formName].chdroom1.value=="2" && (document.forms[""+formName].adt1_chdage1.value=="" || document.forms[""+formName].adt1_chdage2.value==""))
        {
                alert("please enter the children ages ");
                return false;
        }


	else{return true;}
	


}
function daysElapsed(date1,date2) 
{

 var difference =
        Date.UTC(date1.getYear(),date1.getMonth(),date1.getDate(),0,0,0)
      - Date.UTC(date2.getYear(),date2.getMonth(),date2.getDate(),0,0,0);
   return  difference=(difference)/(1000*60*60*24);

}
//to check if date is valid or not;
var dtCh= "/";
var minYear=1900;
var maxYear=2100;
function isInteger(s){
var i;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}
function daysInFebruary (year){
	 return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	var strMonth=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : dd/mm/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}

function showAgeBlock(val,f){
  var f=document.forms[""+f];
  if(val<1){
        window.document.getElementById('cha1').style.display='none';
        window.document.getElementById('cha2').style.display='none';
        f.adt1_chdage1.value='';
        f.adt1_chdage2.value='';
  }
  if(val == 1){
        window.document.getElementById('cha1').style.display='block';
        window.document.getElementById('cha2').style.display='none';
        f.adt1_chdage2.value='';
  }
  if(val == 2){
        window.document.getElementById('cha1').style.display='block';
        window.document.getElementById('cha2').style.display='block';
  }
 }