function iserror(error_msg)
{
  if(!error_msg)
	{
		return true;
	}

  msg = "__________________________________________________\n\n"
  msg += "The form was not submitted because of the following error(s).\n";
  msg += "Please correct these error(s) and re-submit.\n"
  msg += "_________________________________________________\n\n"

  if(error_msg)
  {
		msg += "- The following required field(s) have invalid entries:" + error_msg + "\n";
		alert(msg);
		return false;
  }
}