JQuery在iframe中实现 点击后选中当前栏目的样式

<script type="text/javascript">
    $(function () {
        $("#Nav_left ul li").each(function () {
            $(this).click(function () {
                $("#Nav_left ul li").removeClass("thisnav");
                $(this).addClass("thisnav");
            });
        });
    });
</script>

<div id="Nav_left">
<div class="left_cell">
 <h1 onClick="javascript:ShowMenu(this,0)"  ><a href="javascript:void(0)"  class="LftA1">"十三五"项目管理</a></h1>
 <span class="no">
 <ul>
 <li class="thisnav"><a href="SendSwitch.html" target="rightFrame">报送开送</a></li>
 <li><a href="Send1.html" target="rightFrame">项目报送</a></li>
  <li><a href="Project1.html" target="rightFrame">项目管理</a></li>
  <li><a href="Users1.html" target="rightFrame">用户管理</a></li>
  <li><a href="Category.html" target="rightFrame">分类管理</a></li>
  <li><a href="Stage.html" target="rightFrame">项目阶段</a></li>
 </ul>
 </span>
 </div>
 </div>