default页面：
<html> <head> <script type="text/javascript"> window.onload=function() { var img = document.frames["IFeditValue"].document.getElementById(‘editValue‘); alert(img.innerHTML); } </script> </head> <body> <iframe id="IFeditValue" src="blank.html" scrolling="auto" height="800" width="1000"></iframe> </body> </html>
原文：http://www.cnblogs.com/guwei4037/p/5642714.html