// Preload the main nav

if (document.images) {
	img1 = new Image(100, 100);
	img1.src = "images/topnav_home_on.gif";

	img2 = new Image(100, 100);
	img2.src = "images/topnav_software_on.gif";
	
	img3 = new Image(100, 100); 
	img3.src = "images/topnav_why_on.gif";
	
	img4 = new Image(100, 100);
	img4.src = "images/topnav_about_on.gif";
	
	img5 = new Image(100, 100);
	img5.src = "images/topnav_myidso_on.gif";

}