怎么让DIV自己伸缩?
<div style=" width:810px; background-color:#06F; min-height:210px;word-wrap:break-word;">
<div style="width:200px; height:200px; background-color:#0F0; float:left;">1</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">2</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">3</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">4</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">5</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">6</div>
</div>
<div style=" width:810px; background-color:#06F; min-height:210px;word-wrap:break-word;">
<div style="width:200px; height:200px; background-color:#0F0; float:left;">1</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">2</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">3</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">4</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">5</div>
<div style="width:200px; height:200px; background-color:#0F0; float:left;">6</div>
<div style="clear:both;"></div>
</div>