function nav () {
  var mynavtjek = document.getElementById("leftnav");
  if (mynavtjek){
  document.getElementById("leftnav").innerHTML = document.getElementById("mergefield_navigation_level2").innerHTML;
   Tangora.Layout.Resize();
  Tangora.Layout.Resize();
 }

}

//Tangora.Events.AddHandler(window, "onload", nav);