rollovers = new Array();
// relRoot should be defined in the including parent, after the inclusion
// of this file.
var relRoot = "";

function cache(imgName,ext) {
	var img = new Image();
	img.src = relRoot + "images/"+imgName+"-hover.png";
	rollovers[imgName] = img.src;
}

function cacheImages() {
	cache("home");
	cache("about_us");
	cache("services");
	cache("animal_care");
	cache("contact_us");
}

function swapImage(img) {
	var tmpImgSrc = rollovers[img.name];
	rollovers[img.name] = img.src;
	img.src = tmpImgSrc;
	return true;
}