var ec=1;

function activelayer (subnav) {
  document.getElementById('unte_l').style.visibility='hidden';
  document.getElementById('leis_l').style.visibility='hidden';
  document.getElementById('serv_l').style.visibility='hidden';
  
  document.getElementById('home').src='images/nav/home.gif';
  document.getElementById('unte').src='images/nav/unte.gif';
  document.getElementById('prod').src='images/nav/prod.gif';
  document.getElementById('leis').src='images/nav/leis.gif';
  document.getElementById('refe').src='images/nav/refe.gif';
  document.getElementById('serv').src='images/nav/serv.gif';
  document.getElementById('aktu').src='images/nav/aktu.gif';
  
  if(subnav && subnav != 'out') {
    document.getElementById(subnav).src='images/nav/'+subnav+'1.gif';
    if(subnav == 'unte' || subnav == 'leis' || subnav == 'serv') {
      document.getElementById(subnav+'_l').style.visibility='visible';
    }
  }
}

function WindowWidth() {
 if (window.innerWidth) return window.innerWidth;
 else if (document.body && document.body.offsetWidth) return document.body.offsetWidth;
 else return 0;
}

function WindowRefresh() {
 if (WWidth != WindowWidth()) { window.history.go(0); }
}

if(!window.WWidth && window.innerWidth) {
  window.onresize = WindowRefresh;
  WWidth = WindowWidth();
}