绝对定位的Divs延伸超过页脚

Here's the css:

这是css：

#content-wrapper {clear:both;}
#shell {width:100%;}
* html #content-wrapper { float:left;height: 100%; }
#page-outer{margin:0 auto;}
#page-content {margin:0 0.7%;}
#content-wrapper {cl