diff --git a/htdocs/frontend/javascripts/jquery/jquery-treeTable.js b/htdocs/frontend/javascripts/jquery/jquery-treeTable.js
index 70c52c4..2731b24 100644
--- a/htdocs/frontend/javascripts/jquery/jquery-treeTable.js
+++ b/htdocs/frontend/javascripts/jquery/jquery-treeTable.js
@@ -1,8 +1,8 @@
 /*
- * jQuery treeTable Plugin 2.3.0
- * http://ludo.cubicphuse.nl/jquery-plugins/treeTable/
+ * jQuery treeTable Plugin unreleased
+ * http://ludo.cubicphuse.nl/jquery-plugins/treeTable/doc/
  *
- * Copyright 2010, Ludo van den Boom
+ * Copyright 2011, Ludo van den Boom
  * Dual licensed under the MIT or GPL Version 2 licenses.
  */
 (function($) {
@@ -11,21 +11,21 @@
   // trees on a page. The options shouldn't be global to all these instances!
   var options;
   var defaultPaddingLeft;
-  
+
   $.fn.treeTable = function(opts) {
     options = $.extend({}, $.fn.treeTable.defaults, opts);
-    
+
     return this.each(function() {
       $(this).addClass("treeTable").find("tbody tr").each(function() {
         // Initialize root nodes only if possible
         if(!options.expandable || $(this)[0].className.search(options.childPrefix) == -1) {
           // To optimize performance of indentation, I retrieve the padding-left
-          // value of the first root node. This way I only have to call +css+ 
+          // value of the first root node. This way I only have to call +css+
           // once.
           if (isNaN(defaultPaddingLeft)) {
             defaultPaddingLeft = parseInt($($(this).children("td")[options.treeColumn]).css('padding-left'), 10);
           }
-          
+
           initialize($(this));
         } else if(options.initialState == "collapsed") {
           this.style.display = "none"; // Performance! $(this).hide() is slow...
@@ -33,46 +33,51 @@
       });
     });
   };
-  
+
   $.fn.treeTable.defaults = {
     childPrefix: "child-of-",
     clickableNodeNames: false,
     expandable: true,
     indent: 19,
     initialState: "collapsed",
+    onNodeShow: null,
     treeColumn: 0
   };
-  
+
   // Recursively hide all node's children in a tree
   $.fn.collapse = function() {
     $(this).addClass("collapsed");
-    
+
     childrenOf($(this)).each(function() {
       if(!$(this).hasClass("collapsed")) {
         $(this).collapse();
       }
-      
+
       this.style.display = "none"; // Performance! $(this).hide() is slow...
     });
-    
+
     return this;
   };
-  
+
   // Recursively show all node's children in a tree
   $.fn.expand = function() {
     $(this).removeClass("collapsed").addClass("expanded");
-    
+
     childrenOf($(this)).each(function() {
       initialize($(this));
-      
+
       if($(this).is(".expanded.parent")) {
         $(this).expand();
       }
-      
+
       // this.style.display = "table-row"; // Unfortunately this is not possible with IE :-(
       $(this).show();
+
+      if($.isFunction(options.onNodeShow)) {
+        options.onNodeShow.call();
+      }
     });
-    
+
     return this;
   };
 
@@ -82,7 +87,7 @@
       initialize($(this));
       $(this).expand().show();
     });
-    
+
     return this;
   };
 
@@ -90,9 +95,9 @@
   $.fn.appendBranchTo = function(destination) {
     var node = $(this);
     var parent = parentOf(node);
-    
+
     var ancestorNames = $.map(ancestorsOf($(destination)), function(a) { return a.id; });
-    
+
     // Conditions:
     // 1: +node+ should not be inserted in a location in a branch if this would
     //    result in +node+ being an ancestor of itself.
@@ -102,22 +107,22 @@
     // 3: +node+ should not be inserted as a child of +node+ itself.
     if($.inArray(node[0].id, ancestorNames) == -1 && (!parent || (destination.id != parent[0].id)) && destination.id != node[0].id) {
       indent(node, ancestorsOf(node).length * options.indent * -1); // Remove indentation
-      
+
       if(parent) { node.removeClass(options.childPrefix + parent[0].id); }
-      
+
       node.addClass(options.childPrefix + destination.id);
       move(node, destination); // Recursively move nodes to new location
       indent(node, ancestorsOf(node).length * options.indent);
     }
-    
+
     return this;
   };
-  
+
   // Add reverse() function from JS Arrays
   $.fn.reverse = function() {
     return this.pushStack(this.get().reverse(), arguments);
   };
-  
+
   // Toggle an entire branch
   $.fn.toggleBranch = function() {
     if($(this).hasClass("collapsed")) {
@@ -125,12 +130,12 @@
     } else {
       $(this).removeClass("expanded").collapse();
     }
-    
+
     return this;
   };
-  
+
   // === Private functions
-  
+
   function ancestorsOf(node) {
     var ancestors = [];
     while(node = parentOf(node)) {
@@ -138,47 +143,47 @@
     }
     return ancestors;
   };
-  
+
   function childrenOf(node) {
     return $("table.treeTable tbody tr." + options.childPrefix + node[0].id);
   };
-  
+
   function getPaddingLeft(node) {
     var paddingLeft = parseInt(node[0].style.paddingLeft, 10);
     return (isNaN(paddingLeft)) ? defaultPaddingLeft : paddingLeft;
   }
-  
+
   function indent(node, value) {
     var cell = $(node.children("td")[options.treeColumn]);
     cell[0].style.paddingLeft = getPaddingLeft(cell) + value + "px";
-    
+
     childrenOf(node).each(function() {
       indent($(this), value);
     });
   };
-  
+
   function initialize(node) {
     if(!node.hasClass("initialized")) {
       node.addClass("initialized");
-      
+
       var childNodes = childrenOf(node);
-      
+
       if(!node.hasClass("parent") && childNodes.length > 0) {
         node.addClass("parent");
       }
-      
+
       if(node.hasClass("parent")) {
         var cell = $(node.children("td")[options.treeColumn]);
         var padding = getPaddingLeft(cell) + options.indent;
-        
+
         childNodes.each(function() {
           $(this).children("td")[options.treeColumn].style.paddingLeft = padding + "px";
         });
-        
+
         if(options.expandable) {
           cell.prepend('<span style="margin-left: -' + options.indent + 'px; padding-left: ' + options.indent + 'px" class="expander"></span>');
           $(cell[0].firstChild).click(function() { node.toggleBranch(); });
-          
+
           if(options.clickableNodeNames) {
             cell[0].style.cursor = "pointer";
             $(cell).click(function(e) {
@@ -188,7 +193,7 @@
               }
             });
           }
-          
+
           // Check for a class set explicitly by the user, otherwise set the default class
           if(!(node.hasClass("expanded") || node.hasClass("collapsed"))) {
             node.addClass(options.initialState);
@@ -201,19 +206,21 @@
       }
     }
   };
-  
+
   function move(node, destination) {
     node.insertAfter(destination);
     childrenOf(node).reverse().each(function() { move($(this), node[0]); });
   };
-  
+
   function parentOf(node) {
     var classNames = node[0].className.split(' ');
-    
-    for(key in classNames) {
+
+    for(var key=0; key<classNames.length; key++) {
       if(classNames[key].match(options.childPrefix)) {
         return $("#" + classNames[key].substring(9));
       }
     }
+
+    return null;
   };
 })(jQuery);