var ie=((navigator.appName == "Microsoft Internet Explorer"));
var nn=((navigator.appName == "Netscape") && (parseInt(navigator.appVersion)==5));
var aktiv;
        function makeaktiv()
        {
        a= "b"+aktiv;
        document.images[a].src="gfx/b"+(aktiv)+"h.jpg";
        }

        function mouseover(i){
                a= "b"+i;
                if (i!=aktiv) document.images[a].src="gfx/b"+(i)+"h.jpg";
        }
        function tmouseout(i){
                a= "b"+i;
                if (i!=aktiv) document.images[a].src="gfx/b"+(i)+"n.jpg"

        }
        function layeran(){
        document.getElementById("navi").style.visibility = "visible";
        }
        function layeraus(){
        document.getElementById("navi").style.visibility = "hidden";
        }


        function check2(ereignis){
                   if(!ie){
                       x=ereignis.pageX;
                       y=ereignis.pageY;
                   }
                   if(ie){
                      x=event.x;
                      y=event.y;
                   }
                   if  (y<2) layeraus();
                   if  (y>84) layeraus();
                   if  (x>770)layeraus();
                   if  (x<650)layeraus();

        }
        function printnow(){
        window.print();
        }
document.onmousemove=check2;