Enter键登录

  <div class="zhuce_input_ty">
     <p><a id="qianlogin"  onclick="UserLogin(this);" href="javascript:void(0);" class="bottom-btn">登&nbsp;&nbsp;&nbsp;&nbsp;录</a></p>
   </div>

  var SubmitOrHidden = function(event) {
        e = event ? event : (window.event ? window.event : null);
        if (e.keyCode == 13) {
            UserLogin();
        }
    }
    window.document.onkeydown = SubmitOrHidden;

    function UserLogin() {
        var username = UserValidate.strtrim($("#user_name").val());
        var password = UserValidate.strtrim($("#user_password").val());
        var captcha  = UserValidate.strtrim($("#user_captcha").val());
        var user_role = $("#user_role").val();
}