var loaded="";
function imgCache() {
	if (document.images) {
	homeOn = new Image (170,23);
	homeOn.src = "images/home_1.gif"
	homeOff = new Image (170,23);
	homeOff.src = "images/home_2.gif"
       	butt2On = new Image (170,23);
       	butt2On.src = "images/eyewear_1.gif"
       	butt2Off = new Image (170,23);
      	butt2Off.src = "images/eyewear_2.gif"
       	butt3On = new Image (170,23);
       	butt3On.src = "images/people_1.gif"
       	butt3Off = new Image (170,23);
       	butt3Off.src = "images/people_2.gif"
       	butt4On = new Image (170,23);
       	butt4On.src = "images/insurance_1.gif"
       	butt4Off = new Image (170,23);
       	butt4Off.src = "images/insurance_2.gif"
       	butt5On = new Image (170,23);
	butt5On.src = "images/services_1.gif"
	butt5Off = new Image (170,23);
	butt5Off.src = "images/services_2.gif"
       	butt6On = new Image (170,23);
       	butt6On.src = "images/laser_1.gif"
       	butt6Off = new Image (170,23);
       	butt6Off.src = "images/laser_2.gif"
       	butt7On = new Image (170,23);
       	butt7On.src = "images/hours_1.gif"
       	butt7Off = new Image (170,23);
       	butt7Off.src = "images/hours_2.gif"
       	butt8On = new Image (170,23);
       	butt8On.src = "images/common_problems_1.gif"
       	butt8Off = new Image (170,23);
       	butt8Off.src = "images/common_problems_2.gif"

       	submenu_homeOn = new Image (680,40);
       	submenu_homeOn.src = "images/blank_menu.gif"
       	submenu_butt2On = new Image (680,40);
       	submenu_butt2On.src = "images/blank_menu.gif"
       	submenu_butt3On = new Image (680,40);
       	submenu_butt3On.src = "images/blank_menu.gif"
       	submenu_butt4On = new Image (680,40);
       	submenu_butt4On.src = "images/blank_menu.gif"
       	submenu_butt5On = new Image (680,40);
       	submenu_butt5On.src = "images/blank_menu.gif"
       	submenu_butt6On = new Image (680,40);
       	submenu_butt6On.src = "images/blank_menu.gif"
       	submenu_butt7On = new Image (680,40);
       	submenu_butt7On.src = "images/blank_menu.gif"
       	submenu_butt8On = new Image (680,40);
       	submenu_butt8On.src = "images/blank_menu.gif"
		submenu_empty = new Image (680,40);
		submenu_empty.src = "images/blank_menu.gif"
		loaded = 1;

		}
	}
	
function menuswapOn (menuName) {
	swapImg(menuName,'On.src');
	swapImg('submenu', '_' + menuName + 'On.src');
	}
	
function menuswapOut (menuName) {
	swapImg(menuName,'Off.src');
	swapImg('submenu', '_empty.src');
	}

function swapImg (imgName, swap) {
	if (loaded == 1) {
		document [imgName].src = eval (imgName + swap);
		}
	}