function audioWindow(page, width, height)
  {
    NewWindow = window.open(page, "Audio", "width="+width+", height="+height+", scrollbars=0, resizable=1, location=0, toolbar=0, status=0");
    NewWindow.focus();
  }  
  
  function videoWindow(page, width, height)
  {
    NewWindow = window.open(page, "Video", "width="+width+", height="+height+", scrollbars=0, resizable=1, location=0, toolbar=0, status=0");
    NewWindow.focus();
  }

  function activate_lernen (radioId, checkArrayId) 
  {
    var deaktiviert = true;
    if (document.getElementById("access_typ_"+radioId+"_ind").checked == true) {
      var deaktiviert = false;
    }
    for(var i = 0; i < checkArrayId.length ; i++ )
    {
  	  var oneCheck = document.getElementById("group_permission_lernen_"+checkArrayId[i] );
  	  oneCheck.disabled = deaktiviert;
  	  var oneLabel = document.getElementById("group_permission_lernen_label_"+checkArrayId[i] );
  	  if ( deaktiviert ) {
  		  oneLabel.className = "textlightgrey";
  	  } else {
  		  oneLabel.className = "text";
  	  }
    }
  }
  
    function activate_arbeiten (radioId, checkArrayId) 
    {
      var deaktiviert = true;
      if (document.getElementById("access_typ_"+radioId+"_ind").checked == true) {
        var deaktiviert = false;
      }
      for(var i = 0; i < checkArrayId.length ; i++ )
      {
    	  var oneCheck = document.getElementById("group_permission_arbeiten_"+checkArrayId[i] );
    	  oneCheck.disabled = deaktiviert;
    	  var oneLabel = document.getElementById("group_permission_arbeiten_label_"+checkArrayId[i] );
    	  if ( deaktiviert ) {
    		  oneLabel.className = "textlightgrey";
    	  } else {
    		  oneLabel.className = "text";
    	  }
      }
    }
    
    	var tick;
	function clockStop() {
	   clearTimeout(tick);
	}
	function clock() {
	   var jetzt = new Date();
	   var mo = jetzt.getMonth();
	   var y = jetzt.getYear();
	   if (y < 999)
	    y += 1900;
	   var d = jetzt.getDate();
	   var ut=new Date();
	   var h,m,s;
	   var time="        ";
	   h=ut.getHours();
	   m=ut.getMinutes();
	   s=ut.getSeconds();
	   if(s<=9) s="0"+s;
	   if(m<=9) m="0"+m;
	   if(h<=9) h="0"+h;
	   time+=d+"."+( mo + 1) +"."+y+" " +h+":"+m+":"+s;
	   document.getElementById('clock').innerHTML=time;
	   tick=setTimeout("clock()",1000);    
	}