function auswahl()
{    

   document.write( "<div id=\"wahlbox\">" );
   document.write( "<h2 class=\"u\">Layoutwahl<\/h2>"); 
   document.write( "<form select=\"\">" );     
	document.write( "<select id=\"style\" title=\"Hier k&ouml;nnen Sie das Aussehen dieser Seiten ver&auml;ndern\" size=\"1\" onchange=\"setActiveStyleSheet(value);\">" );
	document.write( "<option selected=\"selected\" disabled=\"disabled\">Einstellungen<\/option>" );

	document.write( "<option value=\"Standardlayout\" title=\"Gestaltung f&uuml;r grafische Browser\">Standardlayout<\/option>" );

	document.write( "<option value=\"Accessibility\" title=\"Ansicht f&uuml;r vergr&ouml;&szlig;erte Darstellung\">Accessibility<\/option>" );

	document.write( "<option value=\"Druck\" title=\"Formatierung f&uuml;r die Druckausgabe\">Druck<\/option>" );

	document.write( "<option value=\"Ohne\" title=\"Layout abgeschaltet\">ohne<\/option>" );

	document.write( "<\/select>" );
	document.write( "<\/form>" );

   document.write( "<a href=\"hilfeseite.html\">Hilfe<\/a>" );
   document.write( "<\/div>" );		
	
}


function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);