<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>iframe自适应高度</title> </head> <body> <div id="leamain"> <iframe src="#" marginheight="0" marginwidth="0" frameborder="0" scrolling="no" width="765" height=100% id="iframepage" name="iframepage" onLoad="iFrameHeight()" ></iframe> </div> <script> 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> </body> </html>
原文：http://www.cnblogs.com/ahwu/p/5051825.html