function preloader() {
 if (document.images){
		heavyImage1 = new Image(); 
		heavyImage1.src = "img/menu/nav_accueil_on.jpg";
		heavyImage2 = new Image(); 
		heavyImage2.src = "img/menu/nav_garage_on.jpg";
		heavyImage3 = new Image(); 
		heavyImage3.src = "img/menu/nav_neufs_on.jpg";
		heavyImage4 = new Image(); 
		heavyImage4.src = "img/menu/nav_occasions_on.jpg";
		heavyImage5 = new Image(); 
		heavyImage5.src = "img/menu/nav_services_on.jpg";
		heavyImage6 = new Image(); 
		heavyImage6.src = "img/menu/nav_plan_on.jpg";
		heavyImage7 = new Image(); 
		heavyImage7.src = "fond_sousmenu.png";
	};	
}
preloader();