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>