JQ添加标签

<script type="text/javascript" src="https://files.cnblogs.com/914556495wxkj/jquery-1.4.1.js"></script>
<script type="text/javascript">
    $(function () { $("#DeltaPlaceHolderLeftNavBar").append("<a href=\'http://baidu.com\'>百度</a>"); })

</script>