Return ID of all iframes in a page

Question

Because of the widget format I\'m working with I have a page which has multiple iframes embedded within iframes. I won\'t paste the code as it\'s vast and unwieldy but it is

Answer 1

EDITED

This returns an iframe element which has the wanted id, and null, if the wanted id is not found.

function searchIds(wantedId) {
    var idArray = [], n,
        search = function (iframes) {
            var n;
            for (n = 0; n < iframes.length; n++) {
                if (iframes[n].frames.length > 0) {
                    search(iframes[n].frames);
                }
                idArray.push(iframes[n].frameElement.id);
                idArray.push(iframes[n].frameElement);
            }
        };
    search(window.top.frames);
    for (n = 0; n < idArray.length; n += 2) {
        if (idArray[n] === wantedId) {
            return idArray[n + 1];
        }
    }
    return null;
}

Notice, that searchIds() can't be run before onload of the main window has been fired.