function checkdata()
{
     var uppervalue;
	 if (document.Contact.name.value.length == 0) {
         alert ("The 'Name' field requires an entry.");
         document.Contact.name.focus();
         return false;
     }
	 	 
	var x = document.Contact.mail.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x)){
		alert ("Please enter a valid email address");
		document.Contact.mail.focus();
		 return false;
		}
     
     if (document.Contact.phone.value.length == 0) {
         alert ("The 'Phone Number' field requires as entry.");
         document.Contact.phone.focus();
         return false;
     }
     if (document.Contact.note.value.length == 0) {
         alert ("The 'Your Message' field requires as entry.");
         document.Contact.note.focus();
         return false;
     }
	 
     return true;

}