让左右页面背景线高度一致

.box{
width:1000px;
overflow:hidden;
margin:o auto;
}

.divleft{
background:url(.../...);
width:230px;
padding-bottom:10000px;
margin-bottom:10000px;
overflow:hidden;
float:left;
}

.divright{
background:url(.../...);
width:770px;
padding-bottom:10000px;
margin-bottom:10000px;
overflow:hidden;
float:right;
}