function newImage(arg) {
    if (document.images) {
        rslt = new Image();
        rslt.src = arg;
        return rslt;
    }
}

function changeImages() {
    if (document.images && (preloadFlag == true)) {
        for (var i = 0; i < changeImages.arguments.length; i += 2) {
            document[changeImages.arguments[i]].src = changeImages.arguments[i + 1];
        }
    }
}

var preloadFlag = false;
function preloadImages() {
    if (document.images) {
        home_over = newImage("../images/home-over.jpg");
        company_over = newImage("../images/company-over.jpg");
        products_over = newImage("../images/products-over.jpg");
        solutions_over = newImage("../images/solutions-over.jpg");
        help_over = newImage("../images/help-over.jpg");
        contact_over = newImage("../images/contact-over.jpg");
        preloadFlag = true;
    }
}