if (document.images) {
    var pictureToPreload = new Image();
    var picturesUrls = new Array();
    picturesUrls[0] = "../img/jquery_tab_bg.png";
    picturesUrls[1] = "../img/jquery_tab_hover.png";
    picturesUrls[2] = "../img/jquery_tabsheader_bg.png";
    picturesUrls[3] = "../img/menu_bg_hover.gif";
    picturesUrls[4] = "../img/visual_default.jpg";
    picturesUrls[5] = "../img/visual_home.jpg";
    picturesUrls[6] = "../img/visual_companies.jpg";
    picturesUrls[7] = "../img/visual_individuals.jpg";
    picturesUrls[8] = "../img/visual_book.jpg";
    picturesUrls[9] = "../img/visual_contact.jpg";
    picturesUrls[10] = "../img/accordion_header_bg.jpg";
    picturesUrls[11] = "../img/accordion_header_bg_hover.jpg";
    picturesUrls[12] = "../img/twitter_widget_left_on.png";
    picturesUrls[13] = "../img/twitter_widget_right_on.png";
    picturesUrls[14] = "../img/twitter_widget_right_disabled.png"; /* left_disabled displayed by default : no preloading needed */
    
    for (var i=0; i<picturesUrls.length; i++)
        pictureToPreload.src = picturesUrls[i];
}