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{
  var link = cachedLink();
  if (link) {
    var parts = link.split('#');
    root = parts[0];
    if (parts.length>1) hash = '#'+parts[1];
    else hash='';
  }
  if (hash.match(/^#l\d+$/)) {
    var anchor=$('a[name='+hash.substring(1)+']');
    glowEffect(anchor.parent(),1000); // line number
    hash=''; // strip line number anchors
    //root=root.replace(/_source\./,'.'); // source link to doc link
  }
  var url=root+hash;
  var i=-1;
  while (NAVTREEINDEX[i+1]<=url) i++;
  if (i==-1) { i=0; root=NAVTREE[0][1]; } // fallback: show index
  if (navTreeSubIndices[i]) {
    gotoNode(o,i,root,hash,relpath)
  } else {
    getScript(relpath+'navtreeindex'+i,function(){
      navTreeSubIndices[i] = eval('NAVTREEINDEX'+i);
      if (navTreeSubIndices[i]) {
        gotoNode(o,i,root,hash,relpath);
      }
    },true);
  }
}

function showSyncOff(n,relpath)
{
    n.html('<img src="'+relpath+'sync_off.png" title="'+SYNCOFFMSG+'"/>');
}

function showSyncOn(n,relpath)
{
    n.html('<img src="'+relpath+'sync_on.png" title="'+SYNCONMSG+'"/>');
}

function toggleSyncButton(relpath)
{
  var navSync = $('#nav-sync');
  if (navSync.hasClass('sync')) {
    navSync.removeClass('sync');
    showSyncOff(navSync,relpath);
    storeLink(stripPath2($(location).attr('pathname'))+$(location).attr('hash'));
  } else {
    navSync.addClass('sync');
    showSyncOn(navSync,relpath);
    deleteLink();
  }
}

function initNavTree(toroot,relpath)
{
  var o = new Object();
  o.toroot = toroot;
  o.node = new Object();
  o.node.li = document.getElementById("nav-tree-contents");
  o.node.childrenData = NAVTREE;
  o.node.children = new Array();
  o.node.childrenUL = document.createElement("ul");
  o.node.getChildrenUL = function() { return o.node.childrenUL; };
  o.node.li.appendChild(o.node.childrenUL);
  o.node.depth = 0;
  o.node.relpath = relpath;
  o.node.expanded = false;
  o.node.isLast = true;
  o.node.plus_img = document.createElement("img");
  o.node.plus_img.src = relpath+"ftv2pnode.png";
  o.node.plus_img.width = 16;
  o.node.plus_img.height = 22;

  if (localStorageSupported()) {
    var navSync = $('#nav-sync');
    if (cachedLink()) {
      showSyncOff(navSync,relpath);
      navSync.removeClass('sync');
    } else {
      showSyncOn(navSync,relpath);
    }
    navSync.click(function(){ toggleSyncButton(relpath); });
  }

  $(window).load(function(){
    navTo(o,toroot,window.location.hash,relpath);
    showRoot();
  });

  $(window).bind('hashchange', function(){
     if (window.location.hash && window.location.hash.length>1){
       var a;
       if ($(location).attr('hash')){
         var clslink=stripPath($(location).attr('pathname'))+':'+
                               $(location).attr('hash').substring(1);
         a=$('.item a[class$="'+clslink+'"]');
       }
       if (a==null || !$(a).parent().parent().hasClass('selected')){
         $('.item').removeClass('selected');
         $('.item').removeAttr('id');
       }
       var link=stripPath2($(location).attr('pathname'));
       navTo(o,link,$(location).attr('hash'),relpath);
     } else if (!animationInProgress) {
       $('#doc-content').scrollTop(0);
       $('.item').removeClass('selected');
       $('.item').removeAttr('id');
       navTo(o,toroot,window.location.hash,relpath);
     }
  })
}