if (document.images) {
			nav1_off = new Image; nav1_off.src = "/img/nav1_off.gif";
			nav1_on = new Image; nav1_on.src = "/img/nav1_on.gif";
			nav2_off = new Image; nav2_off.src = "/img/nav2_off.gif";
			nav2_on = new Image; nav2_on.src = "/img/nav2_on.gif";
			nav3_off = new Image; nav3_off.src = "/img/nav3_off.gif";
			nav3_on = new Image; nav3_on.src = "/img/nav3_on.gif";
			sub_nav1_off = new Image; sub_nav1_off.src = "/img/sub_nav1_off.gif";
			sub_nav1_on = new Image; sub_nav1_on.src = "/img/sub_nav1_on.gif";
			sub_nav1_active = new Image; sub_nav1_active.src = "/img/sub_nav1_active.gif";
			sub_nav2_off = new Image; sub_nav2_off.src = "/img/sub_nav2_off.gif";
			sub_nav2_on = new Image; sub_nav2_on.src = "/img/sub_nav2_on.gif";
			sub_nav2_active = new Image; sub_nav2_active.src = "/img/sub_nav2_active.gif";
			sub_nav3_off = new Image; sub_nav3_off.src = "/img/sub_nav3_off.gif";
			sub_nav3_on = new Image; sub_nav3_on.src = "/img/sub_nav3_on.gif";
			sub_nav3_active = new Image; sub_nav3_active.src = "/img/sub_nav3_active.gif";
			sub_nav4_off = new Image; sub_nav4_off.src = "/img/sub_nav4_off.gif";
			sub_nav4_on = new Image; sub_nav4_on.src = "/img/sub_nav4_on.gif";
			sub_nav4_active = new Image; sub_nav4_active.src = "/img/sub_nav4_active.gif";
			sub_nav5_off = new Image; sub_nav5_off.src = "/img/sub_nav5_off.gif";
			sub_nav5_on = new Image; sub_nav5_on.src = "/img/sub_nav5_on.gif";
			sub_nav5_active = new Image; sub_nav5_active.src = "/img/sub_nav5_active.gif";
			top_off = new Image; top_off.src = "img/top_off.gif";
			top_on = new Image; top_on.src = "img/top_on.gif";
			}