使两个iframe的高度与内容自适应,且相等

答案：<div class="TxtBox"> 
<iframe frameborder="0" scrolling="no" name="news1"  id="news1" onload="if(document.frames['news1'].document.body.scrollHeight>document.frames['news2'].document.body.scrollHeight) document.all.news1.height=document.frames['news1'].document.body.scrollHeight;if(document.frames['news1'].document.body.scrollHeight<=document.frames['news2'].document.body.scrollHeight) document.all.news1.height=document.frames['news2'].document.body.scrollHeight;" src="http://www.zhaoxi.net" width="100%"></iframe> 
</div> 

<div class="TxtBox"> 

<iframe frameborder="0" scrolling="no" name="news2" id="news2" onload="if(document.frames['news1'].document.body.scrollHeight>document.frames['news2'].document.body.scrollHeight) document.all.news2.height=document.frames['news1'].document.body.scrollHeight;if(document.frames['news1'].document.body.scrollHeight<=document.frames['news2'].document.body.scrollHeight) document.all.news2.height=document.frames['news2'].document.body.scrollHeight;" src="http://www.zhaoxi.net/index_1.htm" width="100%"></iframe> 

</div> 
zhaoxi提醒啊，多浏览期兼容需要注意些地方，不要用document.all用兼容好的，

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