iframe自适应高度

通过js 来控制自适应高度；html代码：<iframe src="需要连接的iframe地址" id="iframepage" name="iframepage" frameBorder=0 scrolling=no width="100%" onLoad="iFrameHeight()" ></iframe>js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>