image1 = new Image();
image1.src = "/images/product_grid_background-over.png";

image2 = new Image();
image2.src = "/images/product_grid_background_small-over.png";

image3 = new Image();
image3.src = "/images/product_grid_background_small_square-over.png";

image4 = new Image();
image4.src = "/images/product_grid_background_xsmall_square-over.png";