var topmenu0 = new Image();topmenu0.src = "images/topmenu_about_g.gif";
var topmenu1 = new Image();topmenu1.src = "images/topmenu_services_g.gif";
var topmenu2 = new Image();topmenu2.src = "images/topmenu_clients_g.gif"; 
var topmenu3 = new Image();topmenu3.src = "images/topmenu_contact_g.gif";
var topmenu4 = new Image();topmenu4.src = "images/topmenu_home_g.gif";