<!-- 

image1 = new Image();
image1.src = "images/navbox2_over.png";

image2 = new Image();
image2.src = "images/navbox3_over.png";

image3 = new Image();
image3.src = "images/navbox4_over.png";

image4 = new Image();
image4.src = "images/navbox5_over.png";


-->