html表单验证

$("form").validate({
   onfocusout: function(element){
      $(element).valid();
   },
   rules: {
      'username': {
         required: true,
      },
      password: {
         required: true,
      },
      verify: {
         required: true,
      },
   },
   messages: {
      username: {
         required: "请输入用户名",
      },
      password: {
         required: "请输入密码",
      },
      verify: {
         required: "请输入验证码",
      },
   },
   errorPlacement: function(error, element) {
      //错误信息显示到最后面
      $('.erro_tip').show();
      error.appendTo(element.parents('li').children('.erro_tip'));
   },
   submitHandler: function(form) {
      var self = $(form);
      $.post(self.attr("action"), self.serialize(), success, "json");
      return false;
      function success(data) {
         if(data.status) {
            window.location.href = data.url;
         } else {
            self.find(".Validform_checktip").text(data.info);
            //刷新验证码
            $(".reloadverify").click();
         }
      }
   }
});