var nn4 = ((navigator.appName=="Netscape") && (parseInt(navigator.appVersion) == 4))
var navTime = null
var subnavs = new Array('nav-onlineberatung','nav-uebersicht','nav-links');

function navShow(which) {
  // clear actual hiding timeout
  if(navTime) window.clearTimeout(navTime);
  
  // hide all sub navigations
  for(var i=0; i<subnavs.length;i++) {
    if(subnavs[i]!=which) navHide(subnavs[i]);
  }
  // show current subnav
  subnav = document.getElementById(which)
  subnav.className = subnav.className.replace(' hiddenStructure','');
}

function delayHide(which) {
  navTime=window.setTimeout("navHide('"+which+"')",500);
}

function navHide(which) {
  if(which=="") {
    document.getElementById("onlineRoll").style.visibility="hidden";
    document.getElementById("uebersichtRoll").style.visibility="hidden"
    document.getElementById("linkRoll").style.visibility="hidden"
  } else {
    subnav = document.getElementById(which);
    parentTreeClass = subnav.parentNode.className;
    if((subnav.className.indexOf('hiddenStructure')==-1) && (parentTreeClass.indexOf('actNavTree')==-1)) {
      subnav.className += ' hiddenStructure';
    }
  }
}