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ÔÚÍøÉÏÕÒµ½ÔÚIEϲÙ×÷IFrameÄÚÈݵĴúÂë:
   
document.frames["MyIFrame"].document.getElementById("s").style.color="blue";
µ«ÊÇÕâÔÚFirefoxÏÂÎÞЧ¡£
ËùÒÔ£¬Ïëµ½ÔÚFirefoxÏÂÓÃFireBugÀ´µ÷ÊÔ¡£¾­¹ýµ÷ÊÔ·¢ÏÖÔÚFirefoxÏ¿ÉÓÃÒÔÏ´úÂëÀ´ÊµÏÖ:
   
document.getElementById("MyIFrame").contentDocument.getElementById("s").style.color="blue";
Ïêϸ´úÂëÈçÏÂ:
TestIFrame.htm:
<html>
<head>
<script type="text/javascript">
function f(){
        var doc;
        if (document.all){//IE
                doc = document.frames["MyIFrame"].document;
        }else{//Firefox   
                doc = document.getElementById("MyIFrame").contentDocument;
        }
        doc.getElementById("s").style.color="blue";
}
</script>
</head>
<body onload="f()">
<iframe id = "MyIFrame" name = "MyIFrame" src = "MyIFrame.htm" width = "100" height="100">
</body>
</html>
MyIFrame.htm:


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// Á¬½Óµã·½Ê½Ò³Ãæjavascript½Å±¾
<object classid="CLSID:B568F111-DFE4-4944-B67F-0728AB2AB30F" id="testCom" VIEWASTEXT></object>
<script language="JavaScript" for="testCom" event="staTe(s)">
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Array.prototype.indexOf = function(el, start) {
var start = start || 0;
for ( var i=0; i < this.length; ++i ) {
......
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