var errfound = false;

function ValidateLength(item, len) {
   return (item.length >= len);
}

function ValidateEmail(item) {
   if (!ValidateLength(item, 5)) return false;
   if (item.indexOf ('@', 0) == -1) return false;
   return true;
}

function FormError(elem, text) {
   if (errfound) return;
   window.alert(text);
   elem.select();
   elem.focus();
   errfound = true;
}