browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
  var version;
  if (browserName == "Netscape" && browserVer >= 3) version = "n3";
     else version = "n2";
     if (navigator.appName=="Microsoft Internet Explorer") {
        tempversion = navigator.appVersion;
        tempversion = tempversion.substring(tempversion.indexOf("MSIE",0), tempversion.length);
        tempversion = tempversion.substring(tempversion.indexOf(" ", 0), tempversion.indexOf(";",0));
        tempversion = parseInt(tempversion);
        if (tempversion >= 4) {
           version = "n3";
        }
  }
  if (version == "n3") {
     var rolls = new Array;
     rolls['Agent01(on)'] = new Image;
     rolls['Agent01(on)'].src = "images/agents/agent01(on).jpg";
     rolls['Agent01(off)'] = new Image;
     rolls['Agent01(off)'].src = "images/agents/agent01(off).jpg";
     rolls['Agent02(on)'] = new Image;
     rolls['Agent02(on)'].src = "images/agents/agent02(on).jpg";
     rolls['Agent02(off)'] = new Image;
     rolls['Agent02(off)'].src = "images/agents/agent02(off).jpg";
     rolls['Agent03(on)'] = new Image;
     rolls['Agent03(on)'].src = "images/agents/agent03(on).jpg";
     rolls['Agent03(off)'] = new Image;
     rolls['Agent03(off)'].src = "images/agents/agent03(off).jpg";
     
     rolls['Agent04(on)'] = new Image;
     rolls['Agent04(on)'].src = "images/agents/agent04(on).jpg";
     rolls['Agent04(off)'] = new Image;
     rolls['Agent04(off)'].src = "images/agents/agent04(off).jpg";
     
     rolls['Map00(on)'] = new Image;
     rolls['Map00(on)'].src = "images/agents/overLayUS00.jpg";
     rolls['Map00(off)'] = new Image;
     rolls['Map00(off)'].src = "images/agents/defaultUSMap.jpg";
    
     rolls['Map01(on)'] = new Image;
     rolls['Map01(on)'].src = "images/agents/overLayUS01.jpg";
     rolls['Map01(off)'] = new Image;
     rolls['Map01(off)'].src = "images/agents/defaultUSMap.jpg";
    
     rolls['Map02(on)'] = new Image;
     rolls['Map02(on)'].src = "images/agents/overLayUS02.jpg";
     rolls['Map02(off)'] = new Image;
     rolls['Map02(off)'].src = "images/agents/defaultUSMap.jpg";
    
     rolls['Map03(on)'] = new Image;
     rolls['Map03(on)'].src = "images/agents/overLayUS03.jpg";
     rolls['Map03(off)'] = new Image;
     rolls['Map03(off)'].src = "images/agents/defaultUSMap.jpg";
     
     rolls['Map04(on)'] = new Image;
     rolls['Map04(on)'].src = "images/agents/overLayUS04.jpg";
     rolls['Map04(off)'] = new Image;
     rolls['Map04(off)'].src = "images/agents/defaultUSMap.jpg";
     
     rolls['Mapa1(on)'] = new Image;
     rolls['Mapa1(on)'].src = "images/agents/overLayUSa1.jpg";
     rolls['Mapa1(off)'] = new Image;
     rolls['Mapa1(off)'].src = "images/agents/defaultUSMap.jpg";
     rolls['Mapa2(on)'] = new Image;
     rolls['Mapa2(on)'].src = "images/agents/overLayUSa2.jpg";
     rolls['Mapa2(off)'] = new Image;
     rolls['Mapa2(off)'].src = "images/agents/defaultUSMap.jpg";
     }
  function changeImage(targetObject, srcObject) {
     if (version == "n3") {
        document.images[targetObject].src = rolls[srcObject].src;
        }
  }