iframe adaptive height [passed test under IE6 IE7 FF]_javascript skills

The first method:

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Second method:
js code :

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//iframe adaptive height [under IE6 IE7 Test passed]
function reSetIframe(){
var iframe = document.getElementById("iframeId");
try{
var bHeight = iframe.contentWindow.document.body.scrollHeight;
var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;
var height = Math.max(bHeight, dHeight);
iframe.height = height;
}catch (ex){}
}

html:

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