if (document.images) {
		  
img0on = new Image(); img0on.src = "images/on/logo.gif"; img0off = new Image(); img0off.src = "images/off/logo.gif";
img00on = new Image(); img00on.src = "images/on/icon.gif"; img00off = new Image(); img00off.src = "images/off/icon.gif";
imgCon = new Image(); imgCon.src = "images/on/caribscape.gif"; imgCoff = new Image(); imgCoff.src = "images/off/caribscape.gif";

img1on = new Image(); img1on.src = "images/on/social.gif"; img1off = new Image(); img1off.src = "images/off/social.gif";
img2on = new Image(); img2on.src = "images/on/political.gif"; img2off = new Image(); img2off.src = "images/off/political.gif";
img3on = new Image(); img3on.src = "images/on/ethnic.gif"; img3off = new Image(); img3off.src = "images/off/ethnic.gif";
img4on = new Image(); img4on.src = "images/on/religion.gif"; img4off = new Image(); img4off.src = "images/off/religion.gif";
img5on = new Image(); img5on.src = "images/on/philosophy.gif"; img5off = new Image(); img5off.src = "images/off/philosophy.gif";
img6on = new Image(); img6on.src = "images/on/miscellaneous.gif"; img6off = new Image(); img6off.src = "images/off/miscellaneous.gif";
img7on = new Image(); img7on.src = "images/on/literature.gif"; img7off = new Image(); img7off.src = "images/off/literature.gif";
img8on = new Image(); img8on.src = "images/on/poems.gif"; img8off = new Image(); img8off.src = "images/off/poems.gif";
imgKon = new Image(); imgKon.src = "images/on/biography.gif"; imgKoff = new Image(); imgKoff.src = "images/off/biography.gif";
imgBon = new Image(); imgBon.src = "images/on/books.gif"; imgBoff = new Image(); imgBoff.src = "images/off/books.gif";
imgWon = new Image(); imgWon.src = "images/on/webindex.gif"; imgWoff = new Image(); imgWoff.src = "images/off/webindex.gif";
imgMon = new Image(); imgMon.src = "images/on/mail.gif"; imgMoff = new Image(); imgMoff.src = "images/off/mail.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");
        }
}