Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/PocoDoc/resources/js/CollapsibleLists.js

@@ -0,0 +1,202 @@
+/*
+
+CollapsibleLists.js
+
+An object allowing lists to dynamically expand and collapse
+
+Created by Stephen Morley - http://code.stephenmorley.org/ - and released under
+the terms of the CC0 1.0 Universal legal code:
+
+http://creativecommons.org/publicdomain/zero/1.0/legalcode
+
+Modified by Guenter Obiltschnig (added expansion via URI query string)
+
+*/
+
+// create the CollapsibleLists object
+var CollapsibleLists =
+    new function(){
+
+      /* Makes all lists with the class 'collapsibleList' collapsible. The
+       * parameter is:
+       *
+       * doNotRecurse - true if sub-lists should not be made collapsible
+       */
+      this.apply = function(doNotRecurse){
+
+        // loop over the unordered lists
+        var uls = document.getElementsByTagName('ul');
+        for (var index = 0; index < uls.length; index ++){
+
+          // check whether this list should be made collapsible
+          if (uls[index].className.match(/(^| )collapsibleList( |$)/)){
+
+            // make this list collapsible
+            this.applyTo(uls[index], true);
+
+            // check whether sub-lists should also be made collapsible
+            if (!doNotRecurse){
+
+              // add the collapsibleList class to the sub-lists
+              var subUls = uls[index].getElementsByTagName('ul');
+              for (var subIndex = 0; subIndex < subUls.length; subIndex ++){
+                subUls[subIndex].className += ' collapsibleList';
+              }
+
+            }
+
+          }
+          
+          var id = getParameterByName('expand');
+          if (id){
+          
+             var node = document.getElementById(id);
+             if (node){
+             
+                expand(node);
+             }
+          }
+
+        }
+
+      };
+
+      /* Makes the specified list collapsible. The parameters are:
+       *
+       * node         - the list element
+       * doNotRecurse - true if sub-lists should not be made collapsible
+       */
+      this.applyTo = function(node, doNotRecurse){
+
+        // loop over the list items within this node
+        var lis = node.getElementsByTagName('li');
+        for (var index = 0; index < lis.length; index ++){
+
+          // check whether this list item should be collapsible
+          if (!doNotRecurse || node == lis[index].parentNode){
+
+            // prevent text from being selected unintentionally
+            if (lis[index].addEventListener){
+              lis[index].addEventListener(
+                  'mousedown', function (e){ e.preventDefault(); }, false);
+            }else{
+              lis[index].attachEvent(
+                  'onselectstart', function(){ event.returnValue = false; });
+            }
+
+            // add the click listener
+            if (lis[index].addEventListener){
+              lis[index].addEventListener(
+                  'click', createClickListener(lis[index]), false);
+            }else{
+              lis[index].attachEvent(
+                  'onclick', createClickListener(lis[index]));
+            }
+
+            // close the unordered lists within this list item
+            toggle(lis[index]);
+
+          }
+
+        }
+
+      };
+      
+      /* Expands a node.
+       * 
+       * node - the node containing the unordered list elements
+       */
+      function expand(node){
+         // loop over the unordered list elements with the node
+        var uls = node.getElementsByTagName('ul');
+        for (var index = 0; index < uls.length; index ++){
+
+          // find the parent list item of this unordered list
+          var li = uls[index];
+          while (li.nodeName != 'LI') li = li.parentNode;
+
+          // style the unordered list if it is directly within this node
+          if (li == node) uls[index].style.display = 'block';
+        }
+        // remove the current class from the node
+        node.className =
+            node.className.replace(
+                /(^| )collapsibleList(Open|Closed)( |$)/, '');
+
+        // if the node contains unordered lists, set its class
+        if (uls.length > 0){
+          node.className += ' collapsibleList' + (open ? 'Open' : 'Closed');
+        }
+      }
+
+      /* Returns a function that toggles the display status of any unordered
+       * list elements within the specified node. The parameter is:
+       *
+       * node - the node containing the unordered list elements
+       */
+      function createClickListener(node){
+
+        // return the function
+        return function(e){
+
+          // ensure the event object is defined
+          if (!e) e = window.event;
+
+          // find the list item containing the target of the event
+          var li = (e.target ? e.target : e.srcElement);
+          while (li.nodeName != 'LI') li = li.parentNode;
+
+          // toggle the state of the node if it was the target of the event
+          if (li == node) toggle(node);
+
+        };
+
+      }
+
+      /* Opens or closes the unordered list elements directly within the
+       * specified node. The parameter is:
+       *
+       * node - the node containing the unordered list elements
+       */
+      function toggle(node){
+
+        // determine whether to open or close the unordered lists
+        var open = node.className.match(/(^| )collapsibleListClosed( |$)/);
+
+        // loop over the unordered list elements with the node
+        var uls = node.getElementsByTagName('ul');
+        for (var index = 0; index < uls.length; index ++){
+
+          // find the parent list item of this unordered list
+          var li = uls[index];
+          while (li.nodeName != 'LI') li = li.parentNode;
+
+          // style the unordered list if it is directly within this node
+          if (li == node) uls[index].style.display = (open ? 'block' : 'none');
+
+        }
+
+        // remove the current class from the node
+        node.className =
+            node.className.replace(
+                /(^| )collapsibleList(Open|Closed)( |$)/, '');
+
+        // if the node contains unordered lists, set its class
+        if (uls.length > 0){
+          node.className += ' collapsibleList' + (open ? 'Open' : 'Closed');
+        }
+      }
+      
+      /* Get a URL query string parameter.
+       *
+       * name - the parameter name
+       */
+      function getParameterByName(name){
+      
+         name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
+         var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
+             results = regex.exec(location.search);
+         return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
+      }
+
+    }();