function switchlayer(Layer_Name)
{

  var GECKO = document.getElementById? 1:0 ;
  var NS = document.layers? 1:0 ;
  var IE = document.all? 1:0 ;
  openLayer = Layer_Name;

  open_close = new Array('d1','d2','d3','d4', 'd5','d6', 'd7');//Array mit ids von Untermenus
  left_current = new Array('c1', 'c2'); //Array mit ids von Menupunkten ohne Untermenu
  if (GECKO)
      {     
          for( var i=0; i<open_close.length; i++ )
          {
            if (open_close[i]!=Layer_Name)
                {
                    var obj = document.getElementById(open_close[i]);
                    obj.style.display = "none";
                    obj.parentNode.className="";
                }
           }
           for( var i2=0; i2<left_current.length; i2++)
               {
                   document.getElementById(left_current[i2]).className="";
               }
           document.getElementById(Layer_Name).style.display=
	   (document.getElementById(Layer_Name).style.display=='block') ? 'none' : 'block';
           document.getElementById(Layer_Name).parentNode.className="current";
       }
  else if (NS)
      {
           for( var j=0; j<open_close.length; j++ )
              {
                if (open_close[j]!=Layer_Name)
                    {
                        var obj2 = document.layers[open_close[j]];
                        obj2.display = "none";
                        obj2.parentNode.className="";
                    }
               }
               for( var j2=0; j2<left_current.length; j2++)
               {
                   document.Layers[left_current[j2]].className="";
               }
           document.layers[Layer_Name].display= 'block';
           document.layers[Layer_Name].parentNode.className="current";
      }
  else if (IE)
       {
           for( var k=0; k<open_close.length; k++ )
          {
            if (open_close[k]!=Layer_Name)
                {
                    var obj3 = document.all[open_close[k]];
                    obj3.style.display = "none";
                    obj3.parentNode.className="";
                }
           }
           for( var k2=0; k2<left_current.length; k2++)
               {
                   document.all[left_current[k2]].className="";
               }
           document.all[Layer_Name].style.display = 'block';
           document.all[Layer_Name].parentNode.className="current";
       }
}

function start() {
  if (navigator.userAgent.indexOf("AppleWebKit") > -1)
      {
       var obj = document.getElementById("main");
       obj.style.height="100%";
       var obj2 = document.getElementById("navi-left");
       obj2.style.top="100px";
     }

  var GECKO = document.getElementById? 1:0 ;
  var NS = document.layers? 1:0 ;
  var IE = document.all? 1:0 ;

  open_close = new Array('d1','d2','d3','d4', 'd5','d6', 'd7');//Array mit ids von Untermenus
  if (GECKO)
      {
          for( var i=0; i<open_close.length; i++ )
          {
                  document.getElementById(open_close[i]).style.display = "none";
           }
       }
  else if (NS)
      {
           for( var j=0; j<open_close.length; j++ )
              {
                 document.layers[open_close[j]].display = "none";
               }
      }
  else if (IE)
       {
           for( var k=0; k<open_close.length; k++ )
          {
                    document.all[open_close[k]].style.display = "none";
           }
       }
}