js 实现文字列表滚动效果

今天要实现抽奖名单在首页滚动展示的效果,就用js写了一个,代码如下:

html代码:

<style type="text/css">
*{margin:0;padding:0;list-style-type:none;}
a,img{border:0;}
a,a:visited{color:#5e5e5e; text-decoration:none;}
a:hover{color:#b52725;text-decoration:underline;}
.clear{display:block;overflow:hidden;clear:both;height:0;line-height:0;font-size:0;}
body{font:12px/180% Arial, Helvetica, sans-serif;}
/* ranklist */
.ranklist{height:200px;overflow:hidden;}
.ranklist li{height:26px;line-height:26px; padding-bottom:10px;  overflow:hidden;position:relative;padding:0 70px 0 30px;}
.ranklist li em{background:url(images/mun.gif) no-repeat;20px;height:16px;overflow:hidden;display:block;position:absolute;left:0;top:0;text-align:center;font-style:normal;color:#333;}
.ranklist li em{background-position:0 -16px;}
.ranklist li.top em{background-position:0 0;color:#fff;}
.ranklist li .num{position:absolute;right:0;top:0;color:#999;}
</style>
</head>
<body>
    

    <div class="ranklist" id="ranklist">
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    </div>

js代码:

<script type="text/javascript">
    var scrtime;
    function scrollTextList() {
        /// <summary>
        /// 滚动文字列表
        /// </summary>
        scrtime = window.setInterval(function () {
            var $ul = $("#ranklist ul");

            var liHeight = $ul.find("li:first").height();
            $ul.animate({ marginTop: -liHeight + "px" }, 500, function () {

                $ul.find("li:first").insertAfter($ul.find("li:last"));
                $ul.css({ marginTop: 0 });
            });
        }, 2000);
    }
    $(function () {
        scrollTextList();
        $("#ranklist").mouseover(function () {
            clearInterval(scrtime);
        }).mouseout(function () {
            scrollTextList();
        });
       
    });
</script>