最近在做项目的时候，我发现Iframe可以自动适应加载内容高度，觉得挺新奇，想研究一下这段JS。原来是用到meizz(梅花雪)写的JS，真佩服meizz，可以说写JS已经出神入化了。真想认识一下meizz，看能不能通过朋友介绍认识一下，那真是万分荣幸了。好了，该show一下了。
main.htm:
<html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312' />
<meta name='author' content='F.R.Huang(meizz梅花雪)//www.meizz.com' />
<title>iframe自适应加载的页面高度</title>
</head>
<body>
<iframe src="child.htm"></iframe>
</body>
</html>
child.htm:
<html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=gb2312' />
<meta name='author' content='F.R.Huang(meizz梅花雪)//www.meizz.com' />
<title>iframe 自适应其加载的网页(多浏览器兼容)</title>
<script type="text/javascript">
<!--
function iframeAutoFit()
{
var ex;
try
{
if(window!=parent)
{
var a = parent.document.getElementsByTagName("IFRAME");
for(var i=0; i<a.length; i++) //author:meizz
{
if(a[i].contentWindow==window)
{
var h1=0, h2=0;
if(document.documentElement&&document.documentElement.scrollHeight)
{
h1=document.documentElement.scrollHeight;
}
if(document.body) h2=document.body.scrollHeight;
var h=Math.max(h1, h2);
if(document.all) {h += 4;}
if(window.opera) {h += 1;}
a[i].style.height = h +"px";
}
}
}
}
catch (ex){}
}
if(document.attachEvent)
{
window.attachEvent("onload", iframeAutoFit);
window.attachEvent("onresize", iframeAutoFit);
}
else
{
window.addEventListener('load', iframeAutoFit, false);
window.addEventListener('resize', iframeAutoFit, false);
}
//-->
</script>
</head>
<body>
<table border="1" width="200" style="height: 400px; background-color: yellow">
<tr>
<td>iframe 自适应其加载的网页(多浏览器兼容，支持XHTML)</td>
</tr>
</table>
</body>
</html>
main.htm:<html> <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312' /> <meta name='author' content='F.R.Huang(meizz梅花雪)//www.meizz.com' /> <title>iframe自适应加载的页面高度</title> </head> <body> <iframe src="child.htm"></iframe> </body></html>child.htm:<html> <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312' /> <meta name='author' content='F.R.Huang(meizz梅花雪)//www.meizz.com' /> <title>iframe 自适应其加载的网页(多浏览器兼容)</title> <script type="text/javascript"> <!-- function iframeAutoFit()
{
var ex; try
{ if(window!=parent) { var a = parent.document.getElementsByTagName("IFRAME"); for(var i=0; i<a.length; i++) //author:meizz { if(a[i].contentWindow==window) { var h1=0, h2=0; if(document.documentElement&&document.documentElement.scrollHeight) { h1=document.documentElement.scrollHeight;
} if(document.body) h2=document.body.scrollHeight; var h=Math.max(h1, h2); if(document.all) {h += 4;} if(window.opera) {h += 1;} a[i].style.height = h +"px"; } } } } catch (ex){}
} if(document.attachEvent) { window.attachEvent("onload", iframeAutoFit); window.attachEvent("onresize", iframeAutoFit); } else { window.addEventListener('load', iframeAutoFit, false); window.addEventListener('resize', iframeAutoFit, false); } //--> </script> </head> <body> <table border="1" width="200" style="height: 400px; background-color: yellow"> <tr> <td>iframe 自适应其加载的网页(多浏览器兼容，支持XHTML)</td> </tr> </table></body> </html>来源：https://www.cnblogs.com/yolion/archive/2007/08/14/855511.html