function preLoadImages(){
	// main nav rollovers
	var image1 = new Image();
	image1.src = "/images/nav/nav_main_home_on.gif";
	var image2 = new Image();
	image2.src = "/images/nav/nav_main_about_on.gif";
	var image3 = new Image();
	image3.src = "/images/nav/nav_main_products_on.gif";
	var image4 = new Image();
	image4.src = "/images/nav/nav_main_services_on.gif";
	var image5 = new Image();
	image5.src = "/images/nav/nav_main_portfolio_on.gif";
	var image6 = new Image();
	image6.src = "/images/nav/nav_main_talk_on.gif";
	
	// subnav rollovers
	var image7 = new Image();
	image7.src = "/images/nav/sub_nav_sales_on.gif";
	var image8 = new Image();
	image8.src = "/images/nav/sub_nav_planning_on.gif";
	var image9 = new Image();
	image9.src = "/images/nav/sub_nav_repair_on.gif";
	var image10 = new Image();
	image10.src = "/images/nav/sub_nav_spares_on.gif";
	var image11 = new Image();
	image11.src = "/images/nav/sub_nav_leasing_on.gif";
}

window.onload = function(){
	preLoadImages();
}