$(document).ready(function(){	
	
		$("#internet_services").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/internet_services_header.png)'});
				$("#internet_services").attr("src", "images/internet_services_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#internet_services").attr("src", "images/internet_services.png");
			}
		);
	
		$("#telecoms_services").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/telecoms_services_header.png)'});
				$("#telecoms_services").attr("src", "images/telecoms_services_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#telecoms_services").attr("src", "images/telecoms_services_nav.png");
			}
		);
			
		$("#telephone_systems").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/telephone_systems_header.png)'});
				$("#telephone_systems").attr("src", "images/telephone_systems_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#telephone_systems").attr("src", "images/telephone_systems.png");
			}
		);
			
		$("#IT_systems").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/IT_systems_header.png)'});
				$("#IT_systems").attr("src", "images/IT_systems_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#IT_systems").attr("src", "images/IT_systems.png");
			}
		);
		
		$("#web_services").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/web_services_header.png)'});
				$("#web_services").attr("src", "images/web_services_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#web_services").attr("src", "images/web_services.png");
			}
		);
			
		$("#vendor_solutions").hover(
			function () {
				$(".top-image").css({'background' : 'url(images/vendor_solutions_header.png)'});
				$("#vendor_solutions").attr("src", "images/vendor_solutions_rollover.png");
			}, 
			function () {
				$(".top-image").css({'background' : 'url(images/header3.jpg)'});
				$("#vendor_solutions").attr("src", "images/vendor_solutions.png");
			}
		);
			
	$.preloadImages(['images/menu_bg_rollover.png', 'images/BU-hover-bg.png', 'images/internet_services_header.png', 'images/internet_services_rollover.png', 'images/telecoms_services_header.png', 'images/telecoms_services_rollover.png', 'images/telephone_systems_header.png', 'images/telephone_systems_rollover.png', 'images/IT_systems_header.png', 'images/IT_systems_rollover.png', 'images/web_services_header.png', 'images/web_services_rollover.png', 'images/vendor_solutions_header.png', 'images/vendor_solutions_rollover.png']);

});