function dateDiff1(source1,source2,dest) 
{
	source1=document.getElementById(source1);
	source2=document.getElementById(source2);
	dest=document.getElementById(dest);
	date1 = new Date();
	date2 = new Date();
	diff  = new Date();

	aa1=new Date(source1.value);
	aa2=new Date(source2.value);
	
	  if(aa1!="" && aa2!="")
	  {
			if (aa1 > aa2)
		{
			alert("Check In Date should be smaller than the Check out Date");
			//dest.value="";  
			return false;
		}
		  else
		  {
			     diff.setTime(Math.abs(aa1 - aa2));
				 timediff = diff.getTime();
				 days = Math.floor(timediff / (1000 * 60 * 60 * 24));
                 timediff -= days * (1000 * 60 * 60 * 24);
				 dest.value=days; 
		  }
		  
	  }
	
}