var preload = new Array('/images/product/ShopWalletLicorice_on.jpg', '/images/product/ShopCardWalletBlack_on.jpg', '/images/product/ShopCrewWalletLicorice_on.jpg');

var loader = new Array();
for(var i = 0; i < preload.length; i++){
   loader[i] = new Image();
   loader[i].src = preload[i];
}