browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
             version = "n2";
        if (browserName == "Netscape" && browserVer >= 3) version = "n3";
        if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) version = "n3";               
             if (version == "n3") {
toc1on = new Image();
toc1on.src = "images/brokerage_power.jpg";
toc2on = new Image();
toc2on.src = "images/brokerage_sail.jpg";
toc3on = new Image();
toc3on.src = "images/brokerage_outpower_on.jpg";
toc1off = new Image();
toc1off.src = "images/brokerage_power_off.jpg";
toc2off = new Image();
toc2off.src = "images/brokerage_sail_off.jpg";
toc3off = new Image();
toc3off.src = "images/brokerage_outpower_off.jpg";
             }
     function img_act(imgName) {
             if (version == "n3") {
             imgOn = eval(imgName + "on.src");
             document [imgName].src = imgOn;
             }
     }
     function img_inact(imgName) {
             if (version == "n3") {
             imgOff = eval(imgName + "off.src");
             document [imgName].src = imgOff;
             }
     }