	image1 = new Image();
	image1.src = "images/nav_home_on.gif";
	
	image2 = new Image();
	image2.src = "images/nav_about_on.gif";
	
	image3 = new Image();
	image3.src = "images/nav_prod_on.gif";
	
	image4 = new Image();
	image4.src = "images/nav_contact_on.gif";	 