image1 = new Image();
image1.src = "graphics/navigation/about_over.gif";
image2 = new Image();
image2.src = "graphics/navigation/team_over.gif";
image3 = new Image();
image3.src = "graphics/navigation/portfolio_over.gif";
image4 = new Image();
image4.src = "graphics/navigation/news_over.gif";
image5 = new Image();
image5.src = "graphics/navigation/contact_over.gif";