if (document.images) {
                var cliqueOff = new Image(90, 32);
                cliqueOff.src = "cliqueoff.gif";
                var cliqueOn = new Image(90, 32);
                cliqueOn.src = "cliqueon.gif";

                var netcliqueOff = new Image(134, 38);
                netcliqueOff.src = "netclique0.gif";
                var netcliqueOn = new Image(134, 38);
                netcliqueOn.src = "netclique1.gif";

        }

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

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