if ((navigator.userAgent.substring(0,9) == "Mozilla/3") ||

    (navigator.userAgent.substring(0,9) == "Mozilla/4")) version = "n3";

            else version = "n2";

        if (version == "n3")         {

        v1on = new Image; v1on.src = "http://www.travelcampus.com/images/classlt.gif";
        v1of = new Image; v1of.src = "http://www.travelcampus.com/images/classdk.gif";
        v2on = new Image; v2on.src = "http://www.travelcampus.com/images/mytvllt.gif";
        v2of = new Image; v2of.src = "http://www.travelcampus.com/images/mytvldk.gif";
        v3on = new Image; v3on.src = "http://www.travelcampus.com/images/joblt.gif";
        v3of = new Image; v3of.src = "http://www.travelcampus.com/images/jobdk.gif";
        }
function img_on(imgName) {
        if (version == "n3") {
        imgOn = eval(imgName + "on.src"); document [imgName].src = imgOn;
        }
}
function img_of(imgName) {
        if (version == "n3") {
        imgOf = eval(imgName + "of.src"); document [imgName].src = imgOf;
        }
}