if (document.images) {

imgCon = new Image(); imgCon.src = "../images/on/caribscape.gif"; imgCoff = new Image(); imgCoff.src = "../images/off/caribscape.gif";
imgBon = new Image(); imgBon.src = "../images/on/base.gif"; imgBoff = new Image(); imgBoff.src = "../images/off/base.gif";

imgPre1on = new Image(); imgPre1on.src = "../images/nav/on/lft_gry.gif"; imgPre1off = new Image(); imgPre1off.src = "../images/nav/off/lft_jad.gif"; 
imgPre2on = new Image(); imgPre2on.src = "../images/nav/on/lft_gry.gif"; imgPre2off = new Image(); imgPre2off.src = "../images/nav/off/lft_jad.gif"; 

imgNex1on = new Image(); imgNex1on.src = "../images/nav/on/rgt_gry.gif"; imgNex1off = new Image(); imgNex1off.src = "../images/nav/off/rgt_jad.gif"; 
imgNex2on = new Image(); imgNex2on.src = "../images/nav/on/rgt_gry.gif"; imgNex2off = new Image(); imgNex2off.src = "../images/nav/off/rgt_jad.gif"; 

imgUpon = new Image(); imgUpon.src = "../images/nav/on/up_aqu.gif"; imgUpoff = new Image(); imgUpoff.src = "../images/nav/off/up_aqu.gif";
imgDnon = new Image(); imgDnon.src = "../images/nav/on/up_aqu.gif"; imgDnoff = new Image(); imgDnoff.src = "../images/nav/off/up_aqu.gif";

imgLon = new Image(); imgLon.src = "../images/on/logo.jpg"; imgLoff = new Image(); imgLoff.src = "../images/off/logo.jpg";
imgIon = new Image(); imgIon.src = "../images/on/icon.jpg"; imgIoff = new Image(); imgIoff.src = "../images/off/icon.jpg";

img1on = new Image(); img1on.src = "../images/on/institute.jpg"; img1off = new Image(); img1off.src = "../images/off/institute.jpg";
img2on = new Image(); img2on.src = "../images/on/postgrad.jpg"; img2off = new Image(); img2off.src = "../images/off/postgrad.jpg";
img3on = new Image(); img3on.src = "../images/on/continue.jpg"; img3off = new Image(); img3off.src = "../images/off/continue.jpg";
img4on = new Image(); img4on.src = "../images/on/staff.jpg"; img4off = new Image(); img4off.src = "../images/off/staff.jpg";
img5on = new Image(); img5on.src = "../images/on/library.jpg"; img5off = new Image(); img5off.src = "../images/off/library.jpg";
img6on = new Image(); img6on.src = "../images/on/infotech.jpg"; img6off = new Image(); img6off.src = "../images/off/infotech.jpg";
img7on = new Image(); img7on.src = "../images/on/workshop.jpg"; img7off = new Image(); img7off.src = "../images/off/workshop.jpg";
img8on = new Image(); img8on.src = "../images/on/alumni.jpg"; img8off = new Image(); img8off.src = "../images/off/alumni.jpg";
img9on = new Image(); img9on.src = "../images/on/journal.jpg"; img9off = new Image(); img9off.src = "../images/off/journal.jpg";
imgNon = new Image(); imgNon.src = "../images/on/news.jpg"; imgNoff = new Image(); imgNoff.src = "../images/off/news.jpg";
imgWon = new Image(); imgWon.src = "../images/on/webindex.jpg"; imgWoff = new Image(); imgWoff.src = "../images/off/webindex.jpg";
imgMon = new Image(); imgMon.src = "../images/on/contact.jpg"; imgMoff = new Image(); imgMoff.src = "../images/off/contact.jpg";

img1Aon = new Image(); img1Aon.src = "../images/nav/on_hi.jpg"; img1Aoff = new Image(); img1Aoff.src = "../images/nav/off.gif";
img2Aon = new Image(); img2Aon.src = "../images/nav/on_hi.jpg"; img2Aoff = new Image(); img2Aoff.src = "../images/nav/off.gif";
img3Aon = new Image(); img3Aon.src = "../images/nav/on_hi.jpg"; img3Aoff = new Image(); img3Aoff.src = "../images/nav/off.gif";
img4Aon = new Image(); img4Aon.src = "../images/nav/on_hi.jpg"; img4Aoff = new Image(); img4Aoff.src = "../images/nav/off.gif";
img5Aon = new Image(); img5Aon.src = "../images/nav/on_hi.jpg"; img5Aoff = new Image(); img5Aoff.src = "../images/nav/off.gif";
img6Aon = new Image(); img6Aon.src = "../images/nav/on_hi.jpg"; img6Aoff = new Image(); img6Aoff.src = "../images/nav/off.gif";
img7Aon = new Image(); img7Aon.src = "../images/nav/on_hi.jpg"; img7Aoff = new Image(); img7Aoff.src = "../images/nav/off.gif";
img8Aon = new Image(); img8Aon.src = "../images/nav/on_hi.jpg"; img8Aoff = new Image(); img8Aoff.src = "../images/nav/off.gif";
img9Aon = new Image(); img9Aon.src = "../images/nav/on_hi.jpg"; img9Aoff = new Image(); img9Aoff.src = "../images/nav/off.gif";
imgNAon = new Image(); imgNAon.src = "../images/nav/on_hi.jpg"; imgNAoff = new Image(); imgNAoff.src = "../images/nav/off.gif";
imgWAon = new Image(); imgWAon.src = "../images/nav/on_hi.jpg"; imgWAoff = new Image(); imgWAoff.src = "../images/nav/off.gif";
imgMAon = new Image(); imgMAon.src = "../images/nav/on_hi.jpg"; imgMAoff = new Image(); imgMAoff.src = "../images/nav/off.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");
        }
}