function isEmpty(s) {
  return ((s == null) || (s.length == 0));
}

function checkform(){
	
	if (isEmpty(document.forms['booking'].ht_id.value)) {
		alert("Please specify Hotel, Resort & Inns.");    
		//document.forms['booking'].ht_id.focus();
	    return false;     
	}
	
	if (isEmpty(document.getElementById('fromDate').value)) {
		alert("Please specify check in date.");    
		document.getElementById('fromDate').focus();
	    return false;     
	}
	
	if (isEmpty(document.getElementById('end-date').value)) {
		alert("Please specify check out date.");    
		document.getElementById('end-date').focus();
	    return false;     
	}
		
	if (isEmpty(document.getElementById('totalNights').value)) {
		alert("Please specify total nights.");    
		document.getElementById('totalNights').focus();
	    return false;     
	}
	
	if(document.getElementById('fromDate').value>=document.getElementById('end-date').value){
		alert("Check-in date can not greater than check-out date.");    
		document.getElementById('end-date').focus();
	    return false; 
	}
	
	//DatePicked2();
/*	
	var one_day=1000*60*60*24;
	frdate = document.getElementById('fromDate').value;
	todate = document.getElementById('end-date').value;
	//alert(parseInt(frdate.substring(5,7)));
	var dtStDate = new Date(parseInt(frdate.substring(0,4)),parseInt(frdate.substring(5,7))-1,parseInt(frdate.substring(8,10)));
	var dtEndDate = new Date(parseInt(todate.substring(0,4)),parseInt(todate.substring(5,7))-1,parseInt(todate.substring(8,10)));

	totalnight = Math.ceil((dtEndDate.getTime()-dtStDate.getTime())/(one_day));

	var night = parseInt(document.getElementById('totalNights').value);
	if(totalnight==night){
	}else{
		alert("Total night not equal to date range!");    
		document.getElementById('end-date').focus();
	    return false; 
	}
*/
	document.forms['booking'].submit();
}