CSS
.right{
position: absolute;
right: 0px;
width: 100px;
height: 100px;
background-color: #fcc;
opacity: 0.5;
}
.left{
margin-right: 100px;
height: 100px;
background-color: #123;
}
HTML
<div class="right"></div>
<div class="left"></div>
两栏布局1.jpg
div出生顺序不能变
<div class="left"></div>
<div class="right"></div>
两栏布局2.jpg
