function clearDefault(el) {
  if (el.defaultValue==el.value) el.value = ""
}
function Validator(join)
{
  var error = ""; 
  if ((join.email_join.value.length==0) || (join.email_join.value=="Please enter your email") || (join.email_join.value=="Your Email Address") || (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(join.email_join.value))))
  {
    error += "PLEASE ENTER YOUR EMAIL ADDRESS\n";
  } 
  if (error != "")
  {
    alert(error);
    return (false);
  } else {
    return (true);
  } 
 }