仿天涯底部固定漂浮导航_1

以下为引用的内容：

body {
background-image:url(text.txt); /* for IE6 */
background-attachment:fixed;
}
#bottomNav {
background-color:#096;
z-index:999;
position:fixed;
bottom:0;
left:0;
width:100%;
_position:absolute; /* for IE6 */
_top: expression(documentElement.scrollTop + documentElement.clientHeight-this.offsetHeight); /* for IE6 */
overflow:visible;
}