if (document.images) {
    image1on = new Image();
    image1on.src = "/images/nav_white_aboutOn.gif";
    image2on = new Image();
    image2on.src = "/images/nav_white_calendarOn.gif";
    image3on = new Image();
    image3on.src = "/images/nav_white_newsOn.gif";
    image4on = new Image();
    image4on.src = "/images/nav_white_directoryOn.gif";
    image5on = new Image();
    image5on.src = "/images/nav_white_sitemapOn.gif";

    image1off = new Image();
    image1off.src = "/images/nav_white_aboutOff.gif";
    image2off = new Image();
    image2off.src = "/images/nav_white_calendarOff.gif";
    image3off = new Image();
    image3off.src = "/images/nav_white_newsOff.gif";
    image4off = new Image();
    image4off.src = "/images/nav_white_directoryOff.gif";
    image5off = new Image();
    image5off.src = "/images/nav_white_sitemapOff.gif";
}
function changeImages(){
    if (document.images){
    for (var i=0; i<changeImages.arguments.length; i+=2){
    document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
}}}