if (document.images) {

currentOff = new Image;
currentOff.src = "img/current1.gif";
currentOn = new Image;
currentOn.src = "img/current2.gif";

issuesOff = new Image;
issuesOff.src = "img/issues1.gif";
issuesOn = new Image;
issuesOn.src = "img/issues2.gif";

archivesOff = new Image;
archivesOff.src = "img/archives1.gif";
archivesOn = new Image;
archivesOn.src = "img/archives2.gif";

mediaOff = new Image;
mediaOff.src = "img/media1.gif";
mediaOn = new Image;
mediaOn.src = "img/media2.gif";

aboutOff = new Image;
aboutOff.src = "img/about1.gif";
aboutOn = new Image;
aboutOn.src = "img/about2.gif";

linksOff = new Image;
linksOff.src = "img/links1.gif";
linksOn = new Image;
linksOn.src = "img/links2.gif";

feedbackOff = new Image;
feedbackOff.src = "img/feedback1.gif";
feedbackOn = new Image;
feedbackOn.src = "img/feedback2.gif";

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

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