image1 = new Image();
image1.src = "images/menu_hover/accueil.jpg";

image2 = new Image();
image2.src = "images/menu_hover/presentation.jpg";

image3 = new Image();
image3.src = "images/menu_hover/documentation.jpg";

image4 = new Image();
image4.src = "images/menu_hover/contact.jpg";

image5 = new Image();
image5.src = "images/menu_hover/sub.jpg";