function isFilled(elm) {
   if (elm.value == "" || elm.value == null)
   return false;
   else return true;
}
function isEmail(elm) {
 var email = elm.value;
 if (email.charAt(0) == "@") return false;
 if (!email.match("@")) return false;
 if (!email.match("[.]")) return false;
 if (email == "") return false;
 return true;
}