var ok_browser = 1;  
  bName = navigator.appName;              
  bVer = parseInt(navigator.appVersion);  
  
  ver = "n2"   
  if      (bName == "Netscape" && bVer >= 3) ver = "n3";  
  else if (bName == "Netscape" && bVer == 2) ver = "n2";  
  else if (bName == "Microsoft Internet Explorer" && bVer >= 4) ver = "e4";  
  
  if (ver == "n3" || ver == "e4")   
    ok_browser = 0;  
  else  
    ok_browser = 1;  
  
  if ( ok_browser == 0 )  
  {  
        image0on = new Image(93, 18);
        image0on.src = "img/m_negozio1.gif";
        image0off = new Image(93, 18);
        image0off.src = "img/m_negozio0.gif";
        image1on = new Image(93, 18);
        image1on.src = "img/m_prodotti1.gif";
        image1off = new Image(93, 18);
        image1off.src = "img/m_prodotti0.gif";
        image2on = new Image(166, 18);
        image2on.src = "img/m_kit1.gif";
        image2off = new Image(166, 18);
        image2off.src = "img/m_kit0.gif";
    }  
    function imageon(myname)  
    {  
        if ( ok_browser == 0 )  
        {  
          imgOn = eval(myname + "on.src");  
          document[myname].src = imgOn;  
        }  
    }  
    function imageoff(myname)  
    {  
        if ( ok_browser == 0 )  
        {  
          imgOff = eval(myname + "off.src");  
          document[myname].src = imgOff;  
        }  
    }