if (document.images) {
		imgHome = new Image();
		imgHome.src = "images/usla_nav_home_off.gif";
		imgAboutUs = new Image();
		imgAboutUs.src = "images/usla_nav_aboutus_off.gif";
		imgGallery = new Image();
		imgGallery.src = "images/usla_nav_gallery_off.gif";
		imgServices = new Image();
		imgServices.src = "images/usla_nav_services_off.gif";
		imgContact = new Image();
		imgContact.src = "images/usla_nav_contact_off.gif";
		
		imgHome_on = new Image();
		imgHome_on.src = "images/usla_nav_home_on.gif";
		imgAboutUs_on = new Image();
		imgAboutUs_on.src = "images/usla_nav_aboutus_on.gif";
		imgGallery_on = new Image();
		imgGallery_on.src = "images/usla_nav_gallery_on.gif";
		imgServices_on = new Image();
		imgServices_on.src = "images/usla_nav_services_on.gif";
		imgContact_on = new Image();
		imgContact_on.src = "images/usla_nav_contact_on.gif";
	}

function navmenuon(hotimage) {
	if (document.images) {
		eval("document.btn" + hotimage + ".src = img" + hotimage + "_on.src");
		}
}
function navmenuoff(hotimage) {
	if (document.images) {
		eval("document.btn" + hotimage + ".src = img" + hotimage + ".src");
		}
}