JS 实现 ShowMenu

<script type="text/javascript">
    function showsubmenu(sid)
    {
        var whichEl;
        whichEl = eval("submenu" + sid);
        if (whichEl.style.display == "none")
        {
            eval("submenu" + sid + ".style.display=\"\";");
        }
        else
        {
            eval("submenu" + sid + ".style.display=\"none\";");
        }
    }
</script>

... ...

<div id="submenu0">
        <a href=../admin/admin_articleAdd.jsp>添加新闻</a>
</div>
<div id="submenu1">
        <a href=../admin/admin_article.jsp>管理</a>
</div>
... ...

这样就 ok 了 ！