function checkdata()

{

     var uppervalue;

     if (document.contact.name.value.length == 0) {

         alert ("The 'Booking Name' field requires an entry.");

         document.contact.name.focus();

         return false;

     }

     if (document.contact.email.value.length == 0) {

         alert ("The 'E-Mail' field requires an entry.");

         document.contact.email.focus();

         return false;

     }
	 
	 
	 var x = document.contact.email.value;
	 var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x)){
		alert ("The ['E-mail'] address is NOT valid.");
		document.contact.email.focus();
		 return false;
		}
	 
	 
	 if (document.contact.tel.value == "") {
         alert ("The ['Phone Number'] field requires an entry.");
         document.contact.tel.focus();
         return false;
     }
	 
	
	  if (document.contact.country.value == "null") {
         alert ("The 'Country' field requires an entry.");
         document.contact.country.focus();
         return false;

     }

   if (document.contact.comments.value.length == 0) {
         alert ("The 'Message' field requires an entry.");
         document.contact.comments.focus();
         return false;

     }
     
  
     return true;



}