function getdatediff(reqfield)
{
  var noofdays = document.getElementsByName(reqfield).item(0);
  var cDate = document.getElementsByName("txtDateOfArrival").item(0);
  var dDate = document.getElementsByName("txtDateOfDeparture").item(0);  
 
	var month1=cDate.value.substring(0,2);
	var day1=cDate.value.substring(3,5);
	var year1=cDate.value.substring(6,10);
	month1 = month1 - 1
	var d1=new Date(year1,month1,day1);
//    xxdate.value =new Date(year1,month1,day1);  	

	var month2=dDate.value.substring(0,2);
	var day2=dDate.value.substring(3,5);
	var year2=dDate.value.substring(6,10);
	month2 = month2 - 1
    var d2=new Date(year2,month2,day2);   
//    zzdate.value =new Date(year2,month2,day2);      	
 
	var one_day=1000*60*60*24
	//Calculate difference btw the two dates, and convert to days
	noofdays.value = (d2.getTime()-d1.getTime())/(one_day)
}