HTML页面底脚浮动图片添加

<style type="text/css">
    #dvimg
    {
        z-index: 999;
        position: fixed;
        bottom: 0px;
        left: 0px;
        _position: absolute; /* for IE6 */
        _top: expression(documentElement.scrollTop + documentElement.clientHeight-this.offsetHeight); /* for IE6 */
        overflow: visible;
    }
</style>
<div id="Div1">
    <div style="height: 40px; width: 1003px; margin-left: 0px; float: left">
        <a href="http://adfdsa/dfd.htm" target='_blank' title="title">
            <img border="0" alt="alt" src="images/img.gif" /></a>
    </div>
</div>