function checkform ( form )
{
  // ** START **

	  if (form.x_FirstName.value == "") {
    alert( "Please fill in the First Name field." );
    form.x_FirstName.focus();
    return false ;
  }
	 if (form.x_LastName.value == "") {
    alert( "Please fill in the Last Name field." );
    form.x_LastName.focus();
    return false ;
  }
	 if (form.x_Zip.value == "") {
    alert( "Please fill in the Zip field." );
    form.x_Zip.focus();
    return false ;
  }
  if (form.x_Email.value == "") {
    alert( "Please fill in the Email field." );
    form.x_Email.focus();
    return false ;
  }

  // ** END **
  return true ;
}