if ( parseInt(navigator.appVersion) >= 4 || navigator.appName == "Netscape") {

mofa_on = new Image();

mofa_on.src = "images/button_mofa_on.gif";

mofa_off = new Image();

mofa_off.src = "images/button_mofa.gif";

motorrad_on = new Image();

motorrad_on.src = "images/button_motorrad_on.gif";

motorrad_off = new Image();

motorrad_off.src = "images/button_motorrad.gif";

pkw_on = new Image();

pkw_on.src = "images/button_pkw_on.gif";

pkw_off = new Image();

pkw_off.src = "images/button_pkw.gif";

lkw_anhaenger_on = new Image();

lkw_anhaenger_on.src = "images/button_lkw_anhaenger_on.gif";

lkw_anhaenger_off = new Image();

lkw_anhaenger_off.src = "images/button_lkw_anhaenger.gif";

pkw_anhaenger_on = new Image();

pkw_anhaenger_on.src = "images/button_pkw_anhaenger_on.gif";

pkw_anhaenger_off = new Image();

pkw_anhaenger_off.src = "images/button_pkw_anhaenger.gif";

traktor_on = new Image();

traktor_on.src = "images/button_traktor_on.gif";

traktor_off = new Image();

traktor_off.src = "images/button_traktor.gif";

bus_on = new Image();

bus_on.src = "images/button_bus_on.gif";

bus_off = new Image();

bus_off.src = "images/button_bus.gif";



partners_on = new Image();

partners_on.src = "images/button_partners_on.gif";

partners_off = new Image();

partners_off.src = "images/button_partners_off.gif";

statements_on = new Image();

statements_on.src = "images/button_statements_on.gif";

statements_off = new Image();

statements_off.src = "images/button_statements.gif";

links_on = new Image();

links_on.src = "images/button_links_on.gif";

links_off = new Image();

links_off.src = "images/button_links.gif";



}



var ausgewaehlt="";

var highlighted="";



function doClick(buttonname)

{

   if ( parseInt(navigator.appVersion) >= 4 || navigator.appName == "Netscape")

   {

      bildOn = eval(buttonname + "_on.src");

      if (ausgewaehlt != "")

       {

        bildOff = eval(ausgewaehlt + "_off.src");

       }

      if (buttonname != ausgewaehlt) 

       {

         document[buttonname].src = bildOn;

         if (ausgewaehlt != "")

           {

            document[ausgewaehlt].src = bildOff;

           }

       }

       ausgewaehlt = buttonname;

   }

}



function knopf_on(buttonname)

{

   if ( parseInt(navigator.appVersion) >= 4 || navigator.appName == "Netscape")

   {

      bildOn = eval(buttonname + "_on.src");

      bildOff = eval(buttonname + "_off.src");

      if (buttonname != ausgewaehlt) 

       {

        document[buttonname].src = bildOn;

       }

      if (highlighted != ausgewaehlt && highlighted != buttonname) 

       {

        document[buttonname].src = bildOff;

       }

      highlighted = buttonname;

   }

}

function knopf_off(buttonname)

{

   if ( parseInt(navigator.appVersion) >= 4 || navigator.appName == "Netscape")

   {

     bildOff = eval(buttonname + "_off.src");

     if (highlighted != ausgewaehlt) 

       {

        document[buttonname].src = bildOff;

       }

     highlighted = ausgewaehlt;

   }

}