//Vollbildschirmfenster öffnen
function fullscreenwindow(file) {
 fullscreenwindow = window.open(file);
}

// Navigationsleiste ein- bzw. ausblenden
function navclose() {
 document.getElementById('navigation').style.visibility = 'hidden'
 document.getElementById('navigation').style.width = '0px'
 document.getElementById('navigation').style.margin = '0px'
 document.getElementById('navigation').style.zIndex = '1'
 document.getElementById('content').style.margin = '5px 5px 5px 3px'
 document.getElementById('navopenlink').style.visibility = 'visible'
 document.cookie = "Navigationsleiste=Navigationsleiste deaktiviert";
}

function navopen() {
 document.getElementById('navigation').style.visibility = 'visible'
 document.getElementById('navigation').style.width = '140px'
 document.getElementById('navigation').style.margin = '3px'
 document.getElementById('navigation').style.zIndex = '5'
 document.getElementById('content').style.margin = '5px 5px 5px 160px'
 document.getElementById('navopenlink').style.visibility = 'hidden'
 var jetzt = new Date();
 document.cookie = "Navigationsleiste=Navigationsleiste deaktiviert; expires=" + jetzt.toGMTString();
}

// Navigationsleiste ein- bzw. ausblenden über index.php?page=einstellungen
function navigation(action) {
 if(action == "nothing") {
   document.forms["Navigationsleiste"].reset();
   document.forms["Navigationsleiste"].elements[0].blur();
   return;
 }
 else if(action == "oeffnen") {
  navopen();
 }
 else if(action == "schliessen") {
  navclose();
 }
}

// Cookie ausleses
function WertHolen() {
 var Wert = "";
 if(document.cookie) {
  var Wertstart = document.cookie.indexOf("=") + 1;
  var Wertende = document.cookie.indexOf(";");
  if (Wertende == -1)
   Wertende = document.cookie.length;
  Wert = document.cookie.substring(Wertstart,Wertende);
 }
 return Wert;
}

// Navigation deaktivieren, wenn Cookie gesetzt
function readcookie() {
 if(WertHolen() == "Navigationsleiste deaktiviert") {
  navclose();
 }
}