if (document.images) {
  image1on = new Image();
  image1on.src = "<:oldroot:>/grafik/knapp1a.gif";

  image2on = new Image();
  image2on.src = "<:oldroot:>/grafik/knapp2a.gif";

  image3on = new Image();
  image3on.src = "<:oldroot:>/grafik/knapp3a.gif";

  image4on = new Image();
  image4on.src = "<:oldroot:>/grafik/knapp4a.gif";

  image5on = new Image();
  image5on.src = "<:oldroot:>/grafik/knapp5a.gif";

  image6on = new Image();
  image6on.src = "<:oldroot:>/grafik/knapp6a.gif";


  image1off = new Image();
  image1off.src = "<:oldroot:>/grafik/knapp1b.gif";

  image2off = new Image();
  image2off.src = "<:oldroot:>/grafik/knapp2b.gif";

  image3off = new Image();
  image3off.src = "<:oldroot:>/grafik/knapp3b.gif";

  image4off = new Image();
  image4off.src = "<:oldroot:>/grafik/knapp4b.gif";

  image5off = new Image();
  image5off.src = "<:oldroot:>/grafik/knapp5b.gif";

  image6off = new Image();
  image6off.src = "<:oldroot:>/grafik/knapp6b.gif";
}


function c() {
   document[c.arguments[0]].src = eval(c.arguments[0] + "off.src");
}

function d() {
   document[d.arguments[0]].src = eval(d.arguments[0] + "on.src");
}

function hidestart() {
        if(document.layers){
            //thisbrowser="NN4";
	    document.image10.visibility="hidden";
	    document.image11.visibility="hidden";
	    document.image12.visibility="hidden";

	    document.image13.visibility="hidden";
	    document.image14.visibility="hidden";
	    document.image15.visibility="hidden";

        }
        if(document.all){
            //thisbrowser="ie"
	    document.all.image10.style.visibility="hidden";
	    document.all.image11.style.visibility="hidden";
	    document.all.image12.style.visibility="hidden";

	    document.all.image13.style.visibility="hidden";
	    document.all.image14.style.visibility="hidden";
	    document.all.image15.style.visibility="hidden";
        }
        if(!document.all && document.getElementById){
            //thisbrowser="NN6";
	    document.getElementById("image10").style.visibility="hidden";
	    document.getElementById("image11").style.visibility="hidden";
	    document.getElementById("image12").style.visibility="hidden";

	    document.getElementById("image13").style.visibility="hidden";
	    document.getElementById("image14").style.visibility="hidden";
	    document.getElementById("image15").style.visibility="hidden";

        }

}

function klick() {
	eval("document.image10.width=175");
	eval("document.image10.height=31");

	eval("document.image11.width=175");
	eval("document.image11.height=31");

	eval("document.image12.width=175");
	eval("document.image12.height=31");


	eval("document.image13.width=1");
	eval("document.image13.height=1");

	eval("document.image14.width=1");
	eval("document.image14.height=1");

	eval("document.image15.width=1");
	eval("document.image15.height=1");



        if(document.layers){
            //thisbrowser="NN4";
	    document.image10.visibility="visible";
	    document.image11.visibility="visible";
	    document.image12.visibility="visible";

	    document.image13.visibility="hidden";
	    document.image14.visibility="hidden";
	    document.image15.visibility="hidden";

        }
        if(document.all){
            //thisbrowser="ie"
	    document.all.image10.style.visibility="visible";
	    document.all.image11.style.visibility="visible";
	    document.all.image12.style.visibility="visible";

	    document.all.image13.style.visibility="hidden";
	    document.all.image14.style.visibility="hidden";
	    document.all.image15.style.visibility="hidden";
        }
        if(!document.all && document.getElementById){
            //thisbrowser="NN6";
	    document.getElementById("image10").style.visibility="visible";
	    document.getElementById("image11").style.visibility="visible";
	    document.getElementById("image12").style.visibility="visible";

	    document.getElementById("image13").style.visibility="hidden";
	    document.getElementById("image14").style.visibility="hidden";
	    document.getElementById("image15").style.visibility="hidden";

        }

}


function klick2() {
	eval("document.image13.width=175");
	eval("document.image13.height=31");

	eval("document.image14.width=175");
	eval("document.image14.height=31");

	eval("document.image15.width=175");
	eval("document.image15.height=31");


	eval("document.image10.width=1");
	eval("document.image10.height=1");

	eval("document.image11.width=1");
	eval("document.image11.height=1");

	eval("document.image12.width=1");
	eval("document.image12.height=1");




        if(document.layers){
            //thisbrowser="NN4";
	    document.image13.visibility="visible";
	    document.image14.visibility="visible";
	    document.image15.visibility="visible";

	    document.image10.visibility="hidden";
	    document.image11.visibility="hidden";
	    document.image12.visibility="hidden";

        }
        if(document.all){
            //thisbrowser="ie"
	    document.all.image13.style.visibility="visible";
	    document.all.image14.style.visibility="visible";
	    document.all.image15.style.visibility="visible";

	    document.all.image10.style.visibility="hidden";
	    document.all.image11.style.visibility="hidden";
	    document.all.image12.style.visibility="hidden";
        }
        if(!document.all && document.getElementById){
            //thisbrowser="NN6";
	    document.getElementById("image13").style.visibility="visible";
	    document.getElementById("image14").style.visibility="visible";
	    document.getElementById("image15").style.visibility="visible";

	    document.getElementById("image10").style.visibility="hidden";
	    document.getElementById("image11").style.visibility="hidden";
	    document.getElementById("image12").style.visibility="hidden";

        }

}