var tocHeaderTag = new Array();
var tocEntries   = new Array();
var tocHREF      = new Array();
var tocSize      = 0;
function validateTOC()
{
  if (!document.createElement) return;
  var divArr = document.getElementsByTagName("div");
  if (!divArr) return;

  for (i=0; i<divArr.length; i++)
  {
    if ( divArr[i].className == "insert-toc" )
    {
        showTOC(divArr[i]);
        return; 
    }
  }
}
function showTOC(tocCaption)
{
  tocEntries   = new Array();
  tocHeaderTag = new Array();
  tocSize      = 0;
  var pn = tocCaption.parentNode;
  showTocEntries(pn,tocCaption,false);

  if (tocSize == 0 ) return;

  var nodeBefore    = tocCaption.childNodes[0];
  var nodeTOC       = document.createElement("div");
  nodeTOC.className = "toc";

  for (var i=0; i<tocSize; i++)
  {
    var nodeHX      = document.createElement(tocHeaderTag[i]);
    var nodeAnchor  = document.createElement("a");
    nodeAnchor.setAttribute ("href", "#"+tocHREF[i] );
    var nodeTocText = document.createTextNode(tocEntries[i]);
    nodeAnchor.appendChild(nodeTocText);
    nodeHX.appendChild(nodeAnchor);
    nodeTOC.appendChild(nodeHX);
  }
  var nxt = tocCaption.nextSibling;
  pn.insertBefore(nodeTOC, nxt);
}
function showTocEntries(node,skipCaption,headerFound)
{
  var makeToc = false;

  if ( node == skipCaption)  return;

  if (  (node.nodeName == "H1")
     || (node.nodeName == "H2")
     || (node.nodeName == "H3")
     || (node.nodeName == "H4"))
  {
    headerFound           = true;
    makeToc               = true;
    tocHeaderTag[tocSize] = node.nodeName;
    tocEntries[tocSize]   = "";
    tocHREF[tocSize]      = "";
  }
  if ( (headerFound) && (tocHREF[tocSize] == "") && ( makeToc ) )
  {
  	tocHREF[tocSize] = node.getAttribute("id");
  }
  if ( (headerFound) && (node.nodeType == 3) )
  {
    tocEntries[tocSize] += node.nodeValue ;
  }

  if (node.hasChildNodes) /* walk the tree */
  {
    for (var i=0; i<node.childNodes.length; i++)
    {
      showTocEntries(node.childNodes[i],skipCaption,headerFound);
    }
  }
  if (makeToc)
  {
    var nodeTOP       = document.createElement("a");
    nodeTOP.innerHTML = "&raquo;TOP" ;
    nodeTOP.className = "top";
  	nodeTOP.setAttribute ("href", "#");
    node.appendChild(nodeTOP);
    tocSize++;
  }
}