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Looping through IFrames using Javascript (ie. js)

I'll just paste some code here. It should be self explainatory...



/******************************************************************************************
Requirements:
1. <body onLoad="wt_ad_impression()">
2. <div id="wt_call"></div> somewhere in body
3. <input type="hidden" id="wt_name" name="wt_name" value="wt.AD" /> at Xigla Edit Banner
4. <iframe></iframe> not <iframe /> for FireFox in Ad Zone Grouping
*******************************************************************************************/

var intervalId = 0;
var wt_iframes = null;
var iframeCount = 0;
var iframeIterator = 0;

function wt_ad_impression()
{
alert("called");
wt_iframes = document.getElementsByTagName("iframe");
iframeCount = wt_iframes.length;
intervalId = setInterval(wt_collect, 200);
}

function wt_collect()
{
alert("in wt_collect");
alert("iframeCount="+iframeCount);
alert("iframeIterator="+iframeIterator);
if(iframeIterator < iframeCount)
{
alert("going");
var wt_iframe = wt_iframes[iframeIterator].contentWindow || wt_iframes[iframeIterator].contentDocument;
if (wt_iframe.document)
{
alert("here");
wt_iframe = wt_iframe.document;
var wt_name = wt_iframe.getElementById("wt_name");
if(wt_name)
{
var bugStr = "<IMG border=\"0\" name=\"DCSIMG\" width=\"1\" height=\"1\" SRC=\"http://statse.webtrendslive.com/dcsa8fvfl10000oi64eu0wzzm_4g7c/dcs.gif?dcsuri=" + window.location + "&dcsdat=" + Math.round(10000000000000*Math.random()) + "&WT.ad=" + wt_name.value + "\" />"
alert("value="+bugStr);
var imgElement = document.createElement("img");
imgElement.border = "0";
imgElement.name = "DCSIMG";
imgElement.width = "1";
imgElement.height = "1";
imgElement.src = "http://statse.webtrendslive.com/dcsa8fvfl10000oi64eu0wzzm_4g7c/dcs.gif?dcsuri="
+ window.location + "&dcsdat=" + Math.round(10000000000000*Math.random()) + "&WT.ad="
+ wt_name.value;

var wt_call_div = document.getElementById("wt_call");
wt_call_div.appendChild(imgElement);

}
}
alert("incrementing");
iframeIterator = iframeIterator + 1;
alert("iframeIterator="+iframeIterator);

}
else
{
clearInterval(intervalId);
}
}


To access frames you can also use:

var len = windows.frames.length;
for(var i = 0; i < len; i++)
{
var frame = windows.frames[i];
}


The frames collection can use integers as indexes or a string if the frame has a name ie <iframe name="xyz">.
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