javascript文字无缝滚动示例

<style type="text/css">
    #gundong {
        width: 320px;
        margin: 0 auto;
        background: #dd127b;
        height: 28px;
        line-height: 28px;
        overflow: hidden;
        font-size: 14px;
        color: #fff;
        font-weight: bold;white-space:nowrap
    }
</style>
<title>javascript文字无间隙滚动示例</title>
<div id="gundong">asdddfsddsfdfsddd2523ddsfdddddr2ddetetdddgdfs8o980dd12dsaczvbety|</div>
<script>
    var gundong = document.getElementById("gundong");
    var step = 2, scrollWidth = gundong.scrollWidth;
    gundong.innerHTML += gundong.innerHTML;
    var timer = setInterval(function () {
        gundong.scrollLeft += step;
        if (gundong.scrollLeft >= scrollWidth) gundong.scrollLeft = 0
    }, 50);
</script>