Find which elements are exploding your window size (creating scrollbars)

scrollersScanner

function scanForScrollers(el) {
    var i = [],
        t, x, y, w, h,
        ww = $(window).width(),
        wh = $(window).height();

    el.each(function (index) {
        t = $(this);
        x = t[0].offsetLeft;
        y = t[0].offsetTop;
        w = t.outerWidth();
        h = t.outerHeight();

        if (w > ww || +x + w > ww || h > wh || +y + h > wh) {
            i.push(t[0]);
        }
    });
    return i;
}

//how to use:
var scrollers = scanForScrollers($('body *'));
$(scrollers).addClass('iFoundYou!');

Obvious tip: It needs jQuery to work.