if(document.images){
img19 = new Image();img19.src = "images/nav/nav_services.gif";img19Over = new Image();img19Over.src = "images/nav/nav_services_hover.gif";
img20 = new Image();img20.src = "images/nav/nav_about.gif";img20Over = new Image();img20Over.src = "images/nav/nav_about_hover.gif";
img21 = new Image();img21.src = "images/nav/nav_customer.gif";img21Over = new Image();img21Over.src = "images/nav/nav_customer_hover.gif";
img22 = new Image();img22.src = "images/nav/nav_norw.gif";img22Over = new Image();img22Over.src = "images/nav/nav_norw_hover.gif";

}