if (document.images) {
spn_presson = new Image();
spn_presson.src = "/images/navigation/spn_press_r.gif";
spn_pressoff = new Image();
spn_pressoff.src = "/images/navigation/spn_press_n.gif";
spn_companyon = new Image();
spn_companyon.src = "/images/navigation/spn_company_r.gif";
spn_companyoff = new Image();
spn_companyoff.src = "/images/navigation/spn_company_n.gif";
}


function img_act(imgName) {
    if (document.images) {
        document[imgName].src = eval(imgName + "on.src");
    }
}

function img_inact(imgName) {
    if (document.images) {
        document[imgName].src = eval(imgName + "off.src");
    }
}