IE6浮动换行bug比较实用简单解决方法

.main
{
clear: both;
height: auto;
margin: 0 auto;
overflow: hidden;
width: 980px;
}
.main_l
{
height: 270px;
width: 360px;
float: left;
}
.main_c
{ float: left;
height: 270px;
width: 360px;
}
.main_r
{
height:270px;
width: 260px;
float: right;
}

<div class="main">
<div class="main_l">1</div>
<div class="main_c">2</div>
<div class="main_r">3</div>
</div>