function toggleRows(elm) {
 var rows = document.getElementsByTagName("TR");
 elm.style.backgroundImage = "url(/images/active_scaffold_tree/folder-closed.gif)";
 var newDisplay = "none";
 var thisID = elm.parentNode.parentNode.parentNode.id + "-";
 // Are we expanding or contracting? If the first child is hidden, we expand
  for (var i = 0; i < rows.length; i++) {
   var r = rows[i];
   if (matchStart(r.id, thisID, true)) {
    if (r.style.display == "none") {
     if (document.all) newDisplay = "block"; //IE4+ specific code
     else newDisplay = "table-row"; //Netscape and Mozilla
     elm.style.backgroundImage = "url(/images/active_scaffold_tree/folder-open.gif)";
    }
    break;
   }
 }
 
 // When expanding, only expand one level.  Collapse all desendants.
 var matchDirectChildrenOnly = (newDisplay != "none");

 for (var j = 0; j < rows.length; j++) {
   var s = rows[j];
   if (matchStart(s.id, thisID, matchDirectChildrenOnly)) {
     s.style.display = newDisplay;
     var cell = s.getElementsByTagName("TD")[0];
     var tier = cell.getElementsByTagName("DIV")[0];
     var folder = tier.getElementsByTagName("A")[0];
     if (folder.getAttribute("onclick") != null) {
      folder.style.backgroundImage = "url(/images/active_scaffold_tree/folder-closed.gif)";
     }
   }
 }
}

function matchStart(target, pattern, matchDirectChildrenOnly) {
 var pos = target.indexOf(pattern);
 if (pos != 0) return false;
 if (!matchDirectChildrenOnly) return true;
 if (target.slice(pos + pattern.length, target.length).indexOf("-") >= 0) return false;
 return true;
}

function collapseAllRows() {
 var rows = document.getElementsByTagName("TR");
 for (var j = 0; j < rows.length; j++) {
   var r = rows[j];
   if (r.id.indexOf("-") >= 0) {
     r.style.display = "none";    
   }
 }
}

function moveAfter(tbl_id, elem_id, ref_id)
{
  var tblEl = document.getElementById(tbl_id);
  var tmpEl = document.getElementById(elem_id);
  var refEl = document.getElementById(ref_id);
  tblEl.removeChild(tmpEl);
  tblEl.insertBefore(tmpEl, refEl.nextSibling);
}