var activeImage = new Array();
var normalImage = new Array();

function preloadImage(id, obj) {
	var active = new Image();
	var normal = new Image();

	active.src = obj.overSrc;
	normal.src = obj.outSrc;	

	activeImage[id] = active;
	normalImage[id] = normal;
}

function swapImage(id, obj) {	
	obj.src = activeImage[id].src;
}

function restoreImage(id, obj) {
	obj.src = normalImage[id].src;
}