看下面的例子，我们一起来解决DIV高度自适应的问题。
<div style="width:500px;background:#cccccc;height:0px;">
<div id="right" style="width:380%;height:100%;float:left;border:1px solid #265492;">left4</div>
<div id="left" style="width:60%;;float:left;background:#376037;">
right<br>
right<br>
right<br>
right<br>
right<br>
right<br>
right<br>
</div>
</div>

<script type="text/javascript">
//关键代码
<!--
var a=document.getElementById("left");
var b=document.getElementById("right");
if(a.clientHeight<b.clientHeight)
{
a.style.height=b.clientHeight "px";
}
else{
b.style.height=a.clientHeight "px";
}
-->
</script>