// JavaScript Document

<!-- Begin
var submitcount=0;

function checkFields() {                    
if (                                    
     (document.form1.txtname.value=="") ||
 (document.form1.txtmail.value=="")  ||
  (document.form1.txtphone.value=="")  ||
    (document.form1.txtaddress.value=="")  ||
 (document.form1.txtcity.value=="") ||
 (document.form1.txtproject.value=="") ||
 (document.form1.txtmessage.value==""))  
   {
   alert("Please fill in all field.");
   return false;
   }

else 
   {
   if (submitcount == 0)
      {
      submitcount++;
      return true;
      }
   else 
      {
      alert("This form has already been submitted.");
      return false;
      }
   }
}
//  End -->