services_on = new Image();
services_on.src = 'images/services_on.png';
network_on = new Image();
network_on.src = 'images/network_on.png';
resources_on = new Image();
resources_on.src = 'images/resources_on.png';
support_on = new Image();
support_on.src = 'images/support_on.png';
about_on = new Image();
about_on.src = 'images/about_on.png';
contenttr_on = new Image();
contenttr_on.src = 'images/contenttr_on.png';