var image1 = new Image();
image1.src = "images/footer/facebook_over.jpg";

var image2 = new Image();
image2.src = "images/footer/myspace_over.jpg";

var image3 = new Image();
image3.src = "images/footer/twitter_over.jpg";

var image4 = new Image();
image4.src = "images/footer/youtube_over.jpg";