if ( navigator.appName.indexOf("Netscape") > -1 ) browser="nn";
else browser="ie";

function css () {
         var help="<link rel=stylesheet type=\"text/css\" href=\"format-"+browser+".css\">\n";
         return help;
}

function pop(ziel,b,h) {
         var parameter = 'height=' + h + ',width=' + b + ',hotkeys=no,location=no,' +
             'menubar=no,personalbar=no,resizable=yes,status=no,titlebar=yes,toolbar=no,scrollbars=yes';
         if (window.popUp && !window.popUp.closed) {
            //alert("Schon da!");
            if (window.resizeTo) {
               //alert("Ich kann resize");
               window.popUp.resizeTo(b,h);
               window.popUp.location.href=ziel;
               window.popUp.focus();
            }
            else {
                 //alert("Ich kann kein resize");
                 if (!window.popUp.closed) window.popUp.close();
                 popUp = window.open(ziel,'Infofenster',parameter);
            }
         }
         else {
              //alert("Bin nicht da!");
              //alert(parameter)
              popUp = window.open(ziel,'Infofenster',parameter);
         }
         return false;
}

back_on = new Image();
back_on.src = "img/n_back01.jpg"
back_of = new Image();
back_of.src = "img/n_back00.jpg"

more_on = new Image();
more_on.src = "img/n_more01.jpg"
more_of = new Image();
more_of.src = "img/n_more00.jpg"

close_on = new Image();
close_on.src = "img/n_clse01.jpg"
close_of = new Image();
close_of.src = "img/n_clse00.jpg"

function bw(bild,aktion) {
         if (document.images) document.images[bild].src = aktion.src;
}