function resortTable(td, sort_type, update_num) {
 var sort_column_index = td.cellIndex;
 var table = getParent(td, 'table');
 if (table.rows.length <= 2) return;

 var sortindex = parseInt(table.getAttribute("sortindex"));
 if (isNaN(sortindex))
  sortindex = -1;

 sort_type = sort_type.toLowerCase();
 var newRows = new Array(table.rows.length - 1);
 var v;
 for (var i = 1; i < table.rows.length; i++) {
  newRows[i - 1] = { element: table.rows[i] }
  v = vd_getInnerText(table.rows[i].cells[sort_column_index]);
  if (sort_type == 'caseinsensitive')
   newRows[i - 1].value = v.toLowerCase();
  else if (sort_type == 'date')
   newRows[i - 1].value = text_to_date(v);
  else if (sort_type == 'numeric') {
   newRows[i - 1].value = parseFloat(v);
   if (isNaN(newRows[i - 1].value))
    newRows[i - 1].value = 0;
  } else 
   newRows[i - 1].value = v;
 }

 newRows.sort(sort_data);

 var ascending = 0;
 var img = getLastChild(td, "img");

 if (sort_column_index == sortindex) {
  if (img.getAttribute("sortdir") == 'down')
   ascending = 1;
 } else {
  if (sortindex >= 0) {
   var pimg = getLastChild(table.rows[0].cells[sortindex], "img");
   pimg.className = "sortarrow";
  }

  if (img.getAttribute("sortdir") == 'up')
   ascending = 1;
 }

 if (ascending) 
  newRows.reverse();

 if (update_num)
  for (var i = newRows.length; i > 0; i--)
   newRows[i - 1].element.cells[0].innerHTML = i.toString();
    
 var tBody = table.tBodies[0];

 var nextSibling = tBody.nextSibling;
 var p = tBody.parentNode;
 p.removeChild(tBody);

 for (var i = 0; i < newRows.length; i++) 
  tBody.appendChild(newRows[i].element);

 p.insertBefore(tBody, nextSibling);

 if (ascending) {
  img.className = "sortarrow ascending";
  img.setAttribute('sortdir','up');
 } else {
  img.className = "sortarrow descending";
  img.setAttribute('sortdir','down');
 }
 table.setAttribute('sortindex', sort_column_index);
}

function vd_getInnerText(el) {
 if (typeof el == "string") return el;
 if (typeof el == "undefined") return el;
 if (el.innerText) return el.innerText;

 var str = "";
 var cs = el.childNodes;
 var l = cs.length;
 for (var i = 0; i < l; i++) {
  switch (cs[i].nodeType) {
   case 1: // ELEMENT_NODE
    str += vd_getInnerText(cs[i]);
    break;
   case 3: // TEXT_NODE
    str += cs[i].nodeValue;
    break;
  }
 }
 return str;
}

function getParent(el, pTagName) {
 if (el == null) 
  return null;
 else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
  return el;
 else
  return getParent(el.parentNode, pTagName);
}

function getLastChild(el, pTagName) {
 if (el == null) 
  return null;
 else {
  var res;
  for (var ci = el.childNodes.length - 1; ci >= 0; ci--) {
   res = getLastChild(el.childNodes[ci], pTagName);
   if (res != null)
    return res;

   if (el.childNodes[ci].tagName && el.childNodes[ci].tagName.toLowerCase() == pTagName.toLowerCase())
    return el.childNodes[ci];
  }
  return null;
 }
}

function text_to_date(s) {
 if (s.length == 10)
  return s.substr(6, 4) + s.substr(3, 2) + s.substr(0, 2);
 else {
  yr = s.substr(6, 2);
  if (parseInt(yr) < 50) 
   yr = '20' + yr; 
  else 
   yr = '19' + yr;
  return yr + s.substr(3, 2) + s.substr(0, 2);
 }
}

function sort_data(a, b) {
 if (a.value == b.value) return 0;
 if (a.value < b.value) return -1;
 return 1;
}