js 防止表单多次重复提交

using (Html.BeginForm("action", "controller", new { }, FormMethod.Post, new { name = "submitForm" ,onsubmit="return checkSubmit();" }))

  <script type="text/javascript">    var checkSubmitFlg = false;    function checkSubmit() {        if (checkSubmitFlg == true) {             alert("正在转移！");             return false; //当表单被提交过一次后checkSubmitFlg将变为true,根据判断将无法进行提交。        }        checkSubmitFlg = true;        return true;    }    </script>