var verstecke_navigation;
window.verstecke_navigation_delay = 850;

document.onclick = function() {
 zeige_submenue(0);
}

function zeige_submenue (what) {
 var i;
 for(i=1;document.getElementById('sub' + i);i++) {
   document.getElementById('sub' + i).style.display = 'none';
 }

 if((what!=0) && (what!='sub6')) {
  document.getElementById(what).style.display = 'block';
 }
  
}