if (document.images) {

img0on = new Image(); img0on.src = "images/on/faculty.gif"; img0off = new Image(); img0off.src = "images/off/faculty.gif"; 
img1on = new Image(); img1on.src = "images/on/dept.gif"; img1off = new Image(); img1off.src = "images/off/dept.gif"; 
img2on = new Image(); img2on.src = "images/on/centre.gif"; img2off = new Image(); img2off.src = "images/off/centre.gif";  
img3on = new Image(); img3on.src = "images/on/staff.gif"; img3off = new Image(); img3off.src = "images/off/staff.gif";
img4on = new Image(); img4on.src = "images/on/ungrad.gif"; img4off = new Image(); img4off.src = "images/off/ungrad.gif";
img5on = new Image(); img5on.src = "images/on/postgrad.gif"; img5off = new Image(); img5off.src = "images/off/postgrad.gif";
img6on = new Image(); img6on.src = "images/on/summer.gif"; img6off = new Image(); img6off.src = "images/off/summer.gif";
img7on = new Image(); img7on.src = "images/on/student.gif"; img7off = new Image(); img7off.src = "images/off/student.gif";
img8on = new Image(); img8on.src = "images/on/news.gif"; img8off = new Image(); img8off.src = "images/off/news.gif";
imgWon = new Image(); imgWon.src = "images/on/webindex.gif"; imgWoff = new Image(); imgWoff.src = "images/off/webindex.gif";
imgLon = new Image(); imgLon.src = "images/on/logo.gif"; imgLoff = new Image(); imgLoff.src = "images/off/logo.gif";

img0Aon = new Image(); img0Aon.src = "images/nav/bullet_grey.gif"; img0Aoff = new Image(); img0Aoff.src = "images/nav/space_white.gif"; 
img1Aon = new Image(); img1Aon.src = "images/nav/bullet_grey.gif"; img1Aoff = new Image(); img1Aoff.src = "images/nav/space_white.gif"; 
img2Aon = new Image(); img2Aon.src = "images/nav/bullet_grey.gif"; img2Aoff = new Image(); img2Aoff.src = "images/nav/space_white.gif";  
img3Aon = new Image(); img3Aon.src = "images/nav/bullet_grey.gif"; img3Aoff = new Image(); img3Aoff.src = "images/nav/space_white.gif";
img4Aon = new Image(); img4Aon.src = "images/nav/bullet_grey.gif"; img4Aoff = new Image(); img4Aoff.src = "images/nav/space_white.gif";
img5Aon = new Image(); img5Aon.src = "images/nav/bullet_grey.gif"; img5Aoff = new Image(); img5Aoff.src = "images/nav/space_white.gif";  
img6Aon = new Image(); img6Aon.src = "images/nav/bullet_grey.gif"; img6Aoff = new Image(); img6Aoff.src = "images/nav/space_white.gif";
img7Aon = new Image(); img7Aon.src = "images/nav/bullet_grey.gif"; img7Aoff = new Image(); img7Aoff.src = "images/nav/space_white.gif";
img8Aon = new Image(); img8Aon.src = "images/nav/bullet_grey.gif"; img8Aoff = new Image(); img8Aoff.src = "images/nav/space_white.gif";
imgWAon = new Image(); imgWAon.src = "images/nav/bullet_grey.gif"; imgWAoff = new Image(); imgWAoff.src = "images/nav/space_white.gif";

imgHon = new Image(); imgHon.src = "images/on/home.gif"; imgHoff = new Image(); imgHoff.src = "images/off/home.gif";

        }

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

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