function checkdata()
{
     var uppervalue;
   
   if (document.ThisForm.Contact.value.length < 2) {
         alert ("You forgot your name.");
         document.ThisForm.Contact.focus();
         return false;
     }
  if (document.ThisForm.Addr.value.length < 5) {
         alert ("You forgot your delivery address.");
         document.ThisForm.Addr.focus();
         return false;
     }
  if (document.ThisForm.Town.value.length < 3) {
         alert ("You forgot your town.");
          document.ThisForm.Town.focus();
         return false;
     }
 if (document.ThisForm.Postcode.value.length < 4) {
         alert ("You forgot your postcode.");
         document.ThisForm.Postcode.focus();
         return false;
     }
 if (document.ThisForm.Email.value.length < 8) {
         alert ("Please enter an email contact");
                  document.ThisForm.Email.focus();
         return false;
     }

     return true;
}