function check_contact()
{
	if(document.getElementById("contact_person").value == "")
	 {
	  alert("Please provide contact details.");
	  document.getElementById("contact_person").focus();
      return false;	
	 }
	 
	 if(document.getElementById("phoneno").value == "")
	 {
	  alert("Please provide phone number.");
	  document.getElementById("phoneno").focus();
      return false;	
	 }
	 
	  if(document.getElementById("from_station").value == "")
	 {
	  alert("Please provide from station.");
	  document.getElementById("from_station").focus();
      return false;	
	 }
	 
	 if(document.getElementById("to_station").value == "")
	 {
	  alert("Please provide to station.");
	  document.getElementById("to_station").focus();
      return false;	
	 }
	 
	 
}