iframe自适应高度js

 <iframe src="http://www.fufuok.com/" id="iframepage" name="iframepage" frameBorder=0 scrolling=no width="100%" onLoad="iFrameHeight()" ></iframe>Javascript代码：
 <script type="text/javascript" language="javascript">
 function iFrameHeight() {
 var ifm= document.getElementById("iframepage");
 var subWeb = document.frames ? document.frames["iframepage"].document : ifm.contentDocument;
 if(ifm != null && subWeb != null) {
 ifm.height = subWeb.body.scrollHeight;
 }
 }
 </script>