iframe高度自适应

1. <iframe id="51aspx" name="51aspx" width="100%" onload="this.height=51aspx.document.body.scrollHeight" frameborder="0" src="index.htm"></iframe>

看到了吧，关键就在于！ 下边这个正确~~~~~~~~~~~~~

2. <script language="javascript" type="text/javascript">
3. function dyniframesize(down) {
4. var pTar = null;
5. if (document.getElementById){
6. pTar = document.getElementById(down);
7. }
8. else{
9. eval('pTar = ' + down + ';');
10. }
11. if (pTar && !window.opera){
12. //begin resizing iframe
13. pTar.style.display="block"
14. if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight){
15. //ns6 syntax
16. pTar.height = pTar.contentDocument.body.offsetHeight +20;
17. pTar.width = pTar.contentDocument.body.scrollWidth+20;
18. }
19. else if (pTar.Document && pTar.Document.body.scrollHeight){
20. //ie5+ syntax
21. pTar.height = pTar.Document.body.scrollHeight;
22. pTar.width = pTar.Document.body.scrollWidth;
23. }
24. }
25. }
26. </script>
28. <iframe src ="/default2.aspx"  frameborder="0" marginheight="0" marginwidth="0"  frameborder="0" scrolling="auto" id="ifm" name="ifm"  onload="javascript:dyniframesize('ifm');"  width="100%">
29. </iframe>