image1 = new Image();
image1.src = "http://www.artchallenge.com/hosting/images/home_over.gif";
image2 = new Image();
image2.src = "http://www.artchallenge.com/hosting/images/sample_over.gif";
image3 = new Image();
image3.src = "http://www.artchallenge.com/hosting/images/signup_over.gif";
image4 = new Image();
image4.src = "http://www.artchallenge.com/hosting/images/shop_over.gif";
image5 = new Image();
image5.src = "http://www.artchallenge.com/hosting/images/search_over.gif";
image6 = new Image();
image6.src = "http://www.artchallenge.com/hosting/images/contact_over.gif";
image7 = new Image();
image7.src = "http://www.artchallenge.com/hosting/images/signin_over.gif";