function zeigekarte(url,w,h)
{
l = (screen.availWidth/2)-(w/2);
t = (screen.availHeight/2)-(h/2);
win = window.open(url,'Karte',"width="+w+",height="+h+",left="+l+",top="+t+"");
win.focus();
}

function zeigelegende(url,w,h)
{
l = (screen.availWidth/2)-(w/2);
t = (screen.availHeight/2)-(h/2);
win = window.open(url,'Legende',"width="+w+",height="+h+",left="+l+",top="+t+"");
win.focus();
}