<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<script language="javascript">
window.onload=haha;
function haha()
{
for(var i=0;i<document.all.length;i++)
{
if(document.all[i].tagName=="IFRAME")
{
alert(document.all[i].src);
}
}
}
// alert(document.getElementById("haha").src);
</script>
</BODY>
</HTML>
<iframe src="http://baidu.com" height="0" width="0" frameborder="0"></iframe>
注意:这个例子的iframe在HTML最后,所以一定要利用window.onload事件来调用函数,这样可以让代码载入完毕再调用函数,以免出错.