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>