if (document.images) {
			home_off = new Image(); home_off.src = "images/nav_home_off.gif"; home_hov = new Image(); home_hov.src = "images/nav_home_hov.gif";
			services_off = new Image(); services_off.src = "images/nav_serv_off.gif"; services_hov = new Image(); services_hov.src = "images/nav_serv_hov.gif";
			staff_off = new Image(); staff_off.src = "images/nav_staff_off.gif"; staff_hov = new Image(); staff_hov.src = "images/nav_staff_hov.gif";
			contact_off = new Image(); contact_off.src = "images/nav_contact_off.gif"; contact_hov = new Image(); contact_hov.src = "images/nav_contact_hov.gif";
			links_off = new Image(); links_off.src = "images/nav_links_off.gif"; links_hov = new Image(); links_hov.src = "images/nav_links_hov.gif";
			}

		function clickOn(imgName) {
			if (document.images) {
				document.images[imgName].src = eval(imgName + "_hov.src");
				}
			}
		function clickOff(imgName) {
			if (document.images) {
				document.images[imgName].src = eval(imgName + "_off.src");
				}
			}


	function navtoggle(menu){
		if (menu.style.display =='') {
			menu.style.display = 'none';
			}
		else {
			menu.style.display = '';
			}
		}