if (document.images) {

<!-- Main navigation -->
			aboutCold= new Image()
			aboutCold.src="/images_nav/mainnav_about_cold.gif"
			aboutHot= new Image()
			aboutHot.src="/images_nav/mainnav_about_hot.gif"
			
			screeningroomCold= new Image()
			screeningroomCold.src = "/images_nav/mainnav_screeningroom_cold.gif"
			screeningroomHot= new Image()
			screeningroomHot.src = "/images_nav/mainnav_screeningroom_hot.gif"
				
			servicesCold= new Image()
			servicesCold.src = "/images_nav/mainnav_services_cold.gif"
			servicesHot= new Image()
			servicesHot.src = "/images_nav/mainnav_services_hot.gif"				
			
			clientlistCold= new Image()
			clientlistCold.src = "/images_nav/mainnav_clientlist_cold.gif"
			clientlistHot= new Image()
			clientlistHot.src = "/images_nav/mainnav_clientlist_hot.gif"
			
			contactCold= new Image()
			contactCold.src = "/images_nav/mainnav_contact_cold.gif"
		 	contactHot= new Image()
			contactHot.src = "/images_nav/mainnav_contact_hot.gif"
			
			
		}
		else {
			
			aboutCold = ""
			aboutHot = ""
			screeningroomCold = ""
			screeningroomHot = ""
			servicesCold = ""
			servicesHot = ""
			clientlistCold = ""
			clientlistHot = ""
			contactCold = ""
			contactHot = ""
			document.about.src = ""
			document.screeningroom.src = ""
			document.services.src = ""
			document.clientlist.src = ""
			document.contact.src = ""
		}