function validatorCallback(f){

   if( f.name.value=="Name" ){
      f.name.focus();
      alert("You must enter your name.");
      return;
   }
   if( f.phoneNumber.value=="Phone Number" ){
      f.phoneNumber.focus();
      alert("You must enter your phone number.");
      return;
   }
   if(f.callemail.value=="Email"){
        f.callemail.focus();
		alert("You must enter your Email Address.");
		return;
	}
	
   f.actiontype.value="submit";
   f.submit();
}