页面代码：

程序代码
<div style="border:1px solid #7e99c6" id="frameBox">
       <iframe id="frameWin" src="01.html" name="opWin" style="width:100%; height:100% " frameborder="0" scrolling="no" onload="test2()"></iframe>
</div>

js脚本（加在主页面）：

 程序代码
function test2(){
       var frameWin = document.getElementById("frameWin");
       var frameBox = document.getElementById("frameBox");
       var newHeight;
       if (frameWin.Document){
              newHeight = frameWin.Document.body.scrollHeight + 20 + "px";
       }else{
              newHeight = frameWin.contentDocument.body.scrollHeight+ 20 + "px";
       }
       frameWin.style.height = newHeight;
       frameBox.style.height = newHeight;
}