iframe自适应高度
<html>
<body style='overflow:scroll;overflow-Y:hidden'>
<iframe src=http://www.tuandai.com width=100% height=100% frameborder=0 scrolling=auto></iframe>
</body>
</html>
<iframe name="iframe1" src="URL" frameborder=false scrolling="auto" width="100%" height="100%" frameborder=no onload="document.all['iframe1'].style.height=iframe1.document
.body.scrollHeight" ></iframe>