<divclass="TxtBox">

<iframeframeborder="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.jb51.net"width="100%"></iframe>

</div>

<divclass="TxtBox">

<iframeframeborder="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.jb51.net/index_1.htm"width="100%"></iframe>

</div>

jb51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，