if (document.images) {

imgLon = new Image(); imgLon.src = "images/on/logo.gif"; imgLoff = new Image(); imgLoff.src = "images/off/logo.gif";
imgIon = new Image(); imgIon.src = "images/on/icon.gif"; imgIoff = new Image(); imgIoff.src = "images/off/icon.gif";
//imgCon = new Image(); imgCon.src = "images/on/caribscape.gif"; imgCoff = new Image(); imgCoff.src = "images/off/caribscape.gif";
imgCon = new Image(); imgCon.src = "images/on/caribscape.jpg"; imgCoff = new Image(); imgCoff.src = "images/off/caribscape.jpg";
imgBon = new Image(); imgBon.src = "images/on/builder.gif"; imgBoff = new Image(); imgBoff.src = "images/off/builder.gif";
imgUNon = new Image(); imgUNon.src = "images/on/un.gif"; imgUNoff = new Image(); imgUNoff.src = "images/off/un.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");
        }
}

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