function loginAction()
  {
      var df = document.loginForm;
      var userName=df.userName.value;
      var password=df.password.value;
      var domain=df.domainName.value;
      if(domain && domain!="" && domain!="null")
      {
        df.user.value = userName+"@"+domain; 
      }
      else
      {
          df.user.value = userName; 
      }
      df.user.value=Validator.Trim(df.user.value);
      if( !Validator.Email.test(df.user.value))
      {
        info("请输入合法的帐户！","Please input valid account!","請輸入合法的帳戶！");
        return false;
      } else if(Validator.IsNull(password)){
          info("请输入邮箱密码！","Please input  password!","請輸入郵箱密碼！");
          return false;
      } else {
         return true;
      }
  }