browserName = navigator.appName;
     browserVer = parseInt(navigator.appVersion);
             if ((browserName == "Netscape" && browserVer >= 3)||(browserName == "Microsoft Internet Explorer" && browserVer >= 4)) version = "n3";
             else version = "n2";

             if (version == "n3") {
             ximenu1_on = new Image;
             ximenu1_on.src = "/images/side_button_1_on.gif";
             ximenu1_off = new Image;
             ximenu1_off.src = "/images/side_button_1_off.gif";
             ximenu2_on = new Image;
             ximenu2_on.src = "/images/side_button_2_on.gif";
             ximenu2_off = new Image;
             ximenu2_off.src = "/images/side_button_2_off.gif";
             ximenu3_on = new Image;
             ximenu3_on.src = "/images/side_button_3_on.gif";
             ximenu3_off = new Image;
             ximenu3_off.src = "/images/side_button_3_off.gif";
             ximenu4_on = new Image;
             ximenu4_on.src = "/images/side_button_4_on.gif";
             ximenu4_off = new Image;
             ximenu4_off.src = "/images/side_button_4_off.gif";
             ximenu5_on = new Image;
             ximenu5_on.src = "/images/side_button_5_on.gif";
             ximenu5_off = new Image;
             ximenu5_off.src = "/images/side_button_5_off.gif";
             ximenu6_on = new Image;
             ximenu6_on.src = "/images/side_button_6_on.gif";
             ximenu6_off = new Image;
             ximenu6_off.src = "/images/side_button_6_off.gif";
             ximenu7_on = new Image;
             ximenu7_on.src = "/images/side_button_7_on.gif";
             ximenu7_off = new Image;
             ximenu7_off.src = "/images/side_button_7_off.gif";


}

     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;
             }
     }