if (document.images) {
     img1Outsourceon = new Image(); img1Outsourceon.src = "images/outsource/extend_on.jpg";
     img2Outsourceon = new Image(); img2Outsourceon.src = "images/outsource/why_outsource_on.jpg";
     img3Outsourceon = new Image(); img3Outsourceon.src = "images/outsource/right_on.jpg";
     img4Outsourceon = new Image(); img4Outsourceon.src = "images/outsource/why_choose_on.jpg";
     img5Outsourceon = new Image(); img5Outsourceon.src = "images/outsource/services_on.jpg";         
}
if (document.images) {
    img1Outsourceoff = new Image(); img1Outsourceoff.src = "images/outsource/extend_off.jpg";
    img2Outsourceoff = new Image(); img2Outsourceoff.src = "images/outsource/why_outsource_off.jpg";
    img3Outsourceoff = new Image(); img3Outsourceoff.src = "images/outsource/right_off.jpg";
    img4Outsourceoff = new Image(); img4Outsourceoff.src = "images/outsource/why_choose_off.jpg";
    img5Outsourceoff = new Image(); img5Outsourceoff.src = "images/outsource/services_off.jpg";
}