jq tab

<div id="outer">
    <ul id="tab">
        <li class="current">tab标签</li>
        <li>qq在线客服代码</li>
        <li>css3</li>
    </ul>
    <div id="content">
        <ul style="display:block;">
           <a href="http://www.lanrenzhijia.com/tab">tab标签</a>
        </ul>
        <ul>
            <a href="http://www.lanrenzhijia.com/service">qq在线客服代码</a>
        </ul>
        <ul>
           <a href="http://www.lanrenzhijia.com/js/css3">css3</a>
        </ul>
    </div>
</div>
<!-- html代码end -->

<script src="http://www.lanrenzhijia.com/ajaxjs/jquery.min.js"></script>
<script>
    $(function(){
        window.onload = function()
        {
            var $li = $('#tab li');
            var $ul = $('#content ul');

            $li.mouseover(function(){
                var $this = $(this);
                var $t = $this.index();
                $li.removeClass();
                $this.addClass('current');
                $ul.css('display','none');
                $ul.eq($t).css('display','block');
            })
        }
    });
</script>