function rolloverImg(obj) {
	var image = obj.getElementsByTagName("IMG");
	if(image && !image[0].getAttribute("frozen")) {
		image[0].setAttribute("orig",image[0].src);
		if (!image[0].src.match(/-hover/)) {
			image[0].src = image[0].src.replace(/\.gif$/,'-hover.gif');
			image[0].src = image[0].src.replace(/\.jpg$/,'-hover.jpg');
		}
	}
}

function rolloutImg(obj) {
	var image = obj.getElementsByTagName("IMG");
	if(image && !image[0].getAttribute("frozen")) {
		image[0].src = image[0].getAttribute("orig");
	}	
}

function init() {
	var selected = document.getElementById('selected');
	rolloverImg(selected);
	var image = selected.getElementsByTagName("IMG");
	if(image) {
		image[0].setAttribute("orig",image[0].src);
		image[0].setAttribute("frozen",1);
	}
}