// preload navigation images:

        if (document.images) {

		about_on = new Image();
                about_on.src = "images/about_on.gif";
                about_off = new Image();
                about_off.src = "images/about_off.gif";
                
                services_on = new Image();
		services_on.src = "images/services_on.gif";
		services_off = new Image();
                services_off.src = "images/services_off.gif";
                
                sectors_on = new Image();
		sectors_on.src = "images/sectors_on.gif";
		sectors_off = new Image();
                sectors_off.src = "images/sectors_off.gif";
                
                approach_on = new Image();
		approach_on.src = "images/approach_on.gif";
		approach_off = new Image();
                approach_off.src = "images/approach_off.gif";
                
                news_on = new Image();
		news_on.src = "images/news_on.gif";
		news_off = new Image();
                news_off.src = "images/news_off.gif";
                
                
                design_on = new Image();
		design_on.src = "images/design_on.gif";
		design_off = new Image();
                design_off.src = "images/design_off.gif";
                
                highway_on = new Image();
		highway_on.src = "images/highway_on.gif";
		highway_off = new Image();
                highway_off.src = "images/highway_off.gif";
                
                signup_on = new Image();
		signup_on.src = "images/signup_on.gif";
		signup_off = new Image();
                signup_off.src = "images/signup_off.gif";
                
}
                        
function hiLite(imgID,changeID) {
                        
        if (document.images) {
        document.images[imgID].src = eval(changeID + ".src");
        return true;
        }
}