详解css响应式布局兼容ie6的方法代码

<div class="grid1">
 <div class="left_1">左侧定宽</div>
 <div class="right_1">右侧自适应</div>
</div>

.left_1{float:left; width:200px;}
.right_1{margin-left:200px;}

<div class="grid2 clearfix">
 <div class="left_2">左侧自适应</div>
 <div class="right_2">右侧定宽</div>
</div>

.left_2{float:left; width:100%; margin-right:-200px;}
.right_2{float:right; width:200px;}

<div class="grid3 clearfix">
 <div class="left_3">左侧定宽</div>
 <div class="center_3">中间自适应</div>
 <div class="right_3">右侧定宽</div>
</div>

.left_3, .right_3{position:relative; float:left; width:200px;}
.left_3{margin-right:-200px;}
.right_3{margin-left:-200px;}
.center_3{float:left; width:100%;}

<div class="grid4 clearfix">
 <div class="left_4">左侧自适应</div>
 <div class="center_4">中间定宽</div>
 <div class="right_4">右侧定宽</div>
</div>

.center_4, .right_4{position:relative; float:right; width:200px;}
.left_4{float:left; width:100%; margin-right:-400px;}

<div class="grid5">
 <div class="left_5">左侧定宽</div>
 <div class="center_5">中间定宽</div>
 <div class="right_5">右侧自适应</div>
</div>

.left_5, .center_5{position:relative; float:left;width:200px;}
.right_5{margin-left:400px;}