// JavaScript Document
function valid_search ()
{
	if(document.search_booking.source.value=="")	
	
		 {
   alert("Please select your source station !");
   document.search_booking.source.focus();
		return false;
	 
	  }

if(document.search_booking.destination.value=="")	
	
		 {
   alert("Please select your destination station !");
   document.search_booking.destination.focus();
		return false;
	 
	  }
	  
	
}