bootStrap下拉菜单 点击下拉列表某个元素，列表不隐藏

html：

<a class="dropdown-toggle bgImg-priceWran " id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"></a>

        <div class="dropdown-menu priceWarn_list" aria-labelledby="dropdownMenu1">

            <h3 class="font-14">

                <i class="text-title text-strong">消息提示</i>

                <a>a1</a>

                <a>a2</a>

                <a class="noHide">a3</a>

            </h3>

            <ul class="list-unstyled">

                <li>1</li>

                <li>2</li>

            </ul>

        </div>

js:

$('body').on('click', '.dropdown-menu .noHide', function (e) {

      e.stopPropagation();

});