function mouseoverinit() {
	if (!document.getElementById) return;
	preloads=new Array();
	imgs=document.getElementsByTagName('img');
	for (i=0;i<imgs.length;i++) {
		for (j=0; j<imgs[i].attributes.length; j++) {
			tt = imgs[i].attributes[j].name.toUpperCase();
			if (tt == "SWAP") {
				soff = imgs[i].getAttribute('src'); son = soff.replace("_off","_on");
				preloads[i] = new Image(); preloads[i].src = son;
				imgs[i].onmouseover = new Function("imgs["+i+"].src='"+son+"'");
				imgs[i].onmouseout = new Function("imgs["+i+"].src='"+soff+"'");
			}
		}
	}
}

onload=mouseoverinit;