返回顶部代码
*html{background-image:url(null:void);background-attachment:fixed;}/* 去除ie6 抖动代码 */
.ptn{position:fixed; left:50%; margin-left:478px; top: 106px; _position: absolute;
_top: expression(parseInt(document.documentElement.scrollTop) + "px");}
*html{background-image:url(null:void);background-attachment:fixed;}/* 去除ie6 抖动代码 */
.ptn{position:fixed; left:50%; margin-left:478px; top: 106px; _position: absolute;
_top: expression(parseInt(document.documentElement.scrollTop) + "px");}