bName = navigator.appName;
   bVer = parseInt(navigator.appVersion);
   if (bName == "Netscape" && bVer >= 3) ver = "n3";
   else if (bName == "Netscape" && bVer == 2) ver = "n2"; 
   else if (bName == "Microsoft Internet Explorer" && bVer <= 3) ver = "e3";
   else if (bName == "Microsoft Internet Explorer" && bVer >= 4) ver = "n3";
 
   if (ver == "n3")
 
   {
 
   but1on = new Image(); but1on.src = "images/menu_smallfilm_on.gif";
   but1off = new Image(); but1off.src = "images/menu_smallfilm_off.gif";
 
   but2on = new Image(); but2on.src = "images/menu_werkwijze_on.gif";
   but2off = new Image(); but2off.src = "images/menu_werkwijze_off.gif";
 
   but3on = new Image(); but3on.src = "images/menu_video_on.gif";
   but3off = new Image(); but3off.src = "images/menu_video_off.gif";
 
   but4on = new Image(); but4on.src = "images/menu_menu_on.gif";
   but4off = new Image(); but4off.src = "images/menu_menu_off.gif";
 
   but5on = new Image(); but5on.src = "images/menu_foto_on.gif";
   but5off = new Image(); but5off.src = "images/menu_foto_off.gif";
 
   but6on = new Image(); but6on.src = "images/menu_voorbeeld_on.gif";
   but6off = new Image(); but6off.src = "images/menu_voorbeeld_off.gif";
 
   but7on = new Image(); but7on.src = "images/menu_prijzen_on.gif";
   but7off = new Image(); but7off.src = "images/menu_prijzen_off.gif";
 
   but8on = new Image(); but8on.src = "images/menu_reageren_on.gif";
   but8off = new Image(); but8off.src = "images/menu_reageren_off.gif";
   }
 
   function img_act(imgName)
   {
   if (ver == "n3")
   {
   imgOn = eval(imgName + "on.src");
   document [imgName].src = imgOn;
   }}function img_inact(imgName)
   {if (ver == "n3")
   {
   imgOff = eval(imgName + "off.src");
   document [imgName].src = imgOff;}}