function IBpreloadImgs() {
	var d = document, a = arguments;
	if (!d.IB_imgs) d.IB_imgs = new Array();
	for (var i = 0; i < a.length; i++) {
		d.IB_imgs[i] = new Image;
		d.IB_imgs[i].src = a[i];
	}
}

function IBswapImg() {
	var doc = document, args = arguments, elm, n;
	doc.$imgSwaps = new Array();
	for (n = 2; n < args.length; n += 2) {
		elm = IBgetObjectByID(args[n]);
		if (elm) {
			doc.$imgSwaps[doc.$imgSwaps.length] = elm;
			elm.$src = elm.src;
			elm.src = args[n + 1];
		}
	}
}

function IBgetObjectByID(id, o) {
	var c, el, els, f, m, n;
	if (!o) o = document;
	if (o.getElementById) el = o.getElementById(id);
	else if (o.layers) c = o.layers;
	else if (o.all) el = o.all[id];
	if (el) return el;
	if (o.id == id || o.name == id) return o;
	if (o.childNodes) c = o.childNodes;
	if (c) for (n = 0; n < c.length; n++) {
		el = IBgetObjectByID(id, c[n]);
		if (el) return el;
	}
	f = o.forms;
	if (f) for (n = 0; n < f.length; n++) {
		els = f[n].elements;
		for (m = 0; m < els.length; m++){
			el = IBgetObjectByID(id, els[n]);
			if (el) return el;
		}
	}
	return null;
}