var clicked=null;
 firstklick=0;
    browserName=navigator.appName;
    browserVer=parseInt(navigator.appVersion);
	version="n2";
    if (browserVer >3) version ="n3" ;
    if (browserVer ==3)
       {if (browserName =="Netscape") version ="n3"};
	if (browserVer <3) version ="n2";
	
 if (version=="n3") {
 
 bild1off=new Image();
 bild1off.src="images/buttons/veranstaltungsservice.gif";
 bild2off=new Image();
 bild2off.src="images/buttons/stadtzeitung.gif";
 bild3off=new Image();
 bild3off.src="images/buttons/passwort.gif";
 bild4off=new Image();
 bild4off.src="images/buttons/verlag.gif";
 
 bild1on=new Image();
 bild1on.src="images/buttons/veranstaltungsservice_on.gif";
 bild2on=new Image();
 bild2on.src="images/buttons/stadtzeitung_on.gif";
 bild3on=new Image();
 bild3on.src="images/buttons/passwort_on.gif";
 bild4on=new Image();
 bild4on.src="images/buttons/verlag_on.gif";
 
 
 }


function img_akt(imgName)
{
 if (version=="n3"){
 if(clicked==imgName)return;
 imgOn = eval(imgName + "on.src");
 document [imgName].src = imgOn;
}
}

function img_inakt(imgName)
{
 if (version=="n3"){
 imgOff=eval(imgName + "on.src");
 document [imgName].src = imgOff;
 if(clicked==imgName)return;
 imgOff=eval(imgName + "off.src");
 document [imgName].src = imgOff;
}
}

function img_clicked(imgName)
{
 if (version=="n3"){
 
 
 if(clicked!=null && clicked!=imgName){
 imgOff=eval(clicked + "off.src");
 document [clicked].src=imgOff; 
									  }
clicked=imgName;
                   }

return true;
}