function validate() {
   
    if (document.telform.name.value.length < 2) {
       alert("Please enter your name.");
       return false;
   }
    if (document.telform.telephone.value.length < 10) {
       alert("Please enter your full telephone number.");
       return false;
    }
  if (document.telform.postcode.value.length < 6) {
       alert("Please enter your postcode.");
       return false;
    }
    if (document.telform.message.value.length < 5) {
       alert("Please enter an informative message.");
       return false;
    }
   if (document.telform.rnum.value.length != 1) {
       alert("Please enter one character in the security check box.");
       return false;
    }
   return true;
}