diff --git a/action.php b/action.php
--- a/action.php
+++ b/action.php
@@ -1,140 +1,163 @@
 <?php
 /**
  * DokuWiki Plugin metaeditor (Action Component)
  *
  * Simple Meta Data Editor, heavily AJAX/jQuery based. 
  *
  * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
  * @author  Andreas Böhler <dev@aboehler.at>
  */
 
 
 // must be run within Dokuwiki
 if(!defined('DOKU_INC')) die();
 
 class action_plugin_metaeditor extends DokuWiki_Action_Plugin { 
   
   // Load the helper plugin
   public function action_plugin_metaeditor() {
         
   }
    
   // Register our hooks 
   function register(&$controller) {
     $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handle_ajax_call_unknown');    
   }
   
   function handle_ajax_call_unknown($event, $param) {
     if($event->data != 'plugin_metaeditor') return;
     
     $event->preventDefault();
     $event->stopPropagation();
     global $INPUT;
     //global $auth; // FIXME: Add auth check for admin user here
     
     $action = trim($INPUT->post->str('q'));
     $pageid = trim($INPUT->post->str('r'));
     $key = $INPUT->post->arr('k');
     $data = array();
     $json = false;
     
     switch($action)
     {
       case 'getMeta':
         $data = $this->getMetaForPage($pageid);
         $json = true;
         break;
       case 'getMetaValue':
         $data = $this->getMetaValueForPage($pageid, $key);
         break;
       case 'setMetaValue':
         $oldval = $key['oldval'];
         $newval = $key['newval'];
         $key = $key['key'];
         $data = $this->setMetaValueForPage($pageid, $key, $oldval, $newval);
-        breka;
+        break;
+      case 'deleteMetaValue':
+        $json = true;
+        $key = $key['key'];
+        $data = $this->deleteMetaValueForPage($pageid, $key);
+        break;
     
     }
     
     //$data = $_SERVER['REMOTE_USER'];
     
     
     if($json)
     {
       //json library of DokuWiki
       require_once DOKU_INC . 'inc/JSON.php';
       $json = new JSON();
  
       //set content type
       header('Content-Type: application/json');
       echo $json->encode($data);
     }
     else
     {
       echo $data;
     }
   }
   
   function setMetaValueForPage($pageid, $key, $oldval, $newval)
   {
     $cache = false;
     $meta = p_read_metadata($pageid, $cache);
     $m = &$meta;
     foreach($key as $k)
       $m = &$m[$k];
     if($m == $oldval)
     {
       $m = $newval;
       if(p_save_metadata($pageid, $meta))
         return "Successfully saved: $newval";
       else
         return "Error saving value: $newval";
     }
     else
     {
       return "Key has changed in the meantime, expected $oldval but got $m. Nothing was saved!";
     }
   
   }
   
+  function deleteMetaValueForPage($pageid, $key)
+  {
+    $cache = false;
+    $meta = p_read_metadata($pageid, $cache);
+    $m = &$meta;
+    for($i=0;$i<count($key);$i++)
+    {
+      if($i == count($key)-1)
+        unset($m[$key[$i]]);
+      else
+        $m = &$m[$key[$i]];
+    }
+    if(p_save_metadata($pageid, $meta))
+      return array(true, "Successfully deleted key: $key");
+    else
+      return array(false, "Error deleting key: $key");
+  }
+  
   function parseMetaTree($meta)
   {
     $out = array();
     foreach($meta as $k => $v)
     {
       $a = array();
       $a['text'] = $k;
       if(is_array($v))
       {
         $a['children'] = $this->parseMetaTree($v);
       }
       else
       $a['icon'] = DOKU_URL."/lib/images/page.png";
       $out[] = $a;
     }
     return $out;
   }
   
   function getMetaForPage($pageid)
   {
     $cache = false;
     $meta = p_read_metadata($pageid, $cache);
     $out = $this->parseMetaTree($meta);
     return $out;
   }
   
   function getMetaValueForPage($pageid, $key)
   {
     $cache = false;
     $meta = p_read_metadata($pageid, $cache);
     foreach($key as $k)
     {
       $meta = $meta[$k];
     }
     return $meta;
   }
   
   
   
   
 }
diff --git a/script.js b/script.js
--- a/script.js
+++ b/script.js
@@ -1,99 +1,188 @@
 /* DOKUWIKI:include_once jstree.js */
 
 jQuery(function()
 {   
 
     var selectedPageId = null;
     var selectedNode = null;
+    var selectedNodePath = null;
     var selectedNodeValue = null;
+    var jqConfirmModal = null;
     
     jQuery('#event_save').click(function() {
       var newVal = jQuery('#event_value').val()
       jQuery.post(
         DOKU_BASE + 'lib/exe/ajax.php',
         {
           call: 'plugin_metaeditor',
           q: 'setMetaValue',
           r: selectedPageId,
           k: {
             key : selectedNode,
             oldval : selectedNodeValue,
             newval : newVal
           }        
         },
         function(data) {
           alert(data);
         }
       );
     
     });
     
+    jqConfirmModal = jQuery(document.createElement('div'))
+               .dialog({
+                   autoOpen: false,
+                   draggable: true,
+                   //title: LANG.plugins.signpage.signpage,
+                   title: "Confirmation",
+                   resizable: true,
+                   buttons: {
+                       Yes: function() {
+                         jQuery.post(
+                           DOKU_BASE + 'lib/exe/ajax.php',
+                           jqConfirmModal.data,
+                           function(data) {
+                             alert(data);
+                           }
+                         );
+                         jQuery( this ).parent().hide("scale", {percentage: 0}, 750);
+                       },
+                       Cancel: function() {
+                         jQuery( this ).parent().hide("scale", {percentage: 0}, 750);
+                       }
+                   }
+               })
+               .html(
+                    '<div>Really proceed with the requested action? It cannot be undone.</div>'
+                    )
+               .parent()
+               .attr('id','metaeditor__confirm')
+               .hide()
+               .appendTo('.dokuwiki:first');
+
+
+
+    // attach event handlers
+    jQuery('#metaeditor__confirm .ui-dialog-titlebar-close').click(function(){
+      jqConfirmModal.hide("scale", {percentage: 0}, 750);
+    });
+    
     jQuery('#metaTree').on('changed.jstree', function (e, data) {
       var i, j, r;
       if(data.selected.length != 1)
         return;
       var node = data.instance.get_node(data.selected[0]);
+      r = data.instance.get_path(data.selected[0]);
+      selectedNodePath = r;
       if(!data.instance.is_leaf(node))
         return;
-      r = data.instance.get_path(data.selected[0]);
       selectedNode = r;
       jQuery.post(
         DOKU_BASE + 'lib/exe/ajax.php',
         {
           call: 'plugin_metaeditor', 
           q: 'getMetaValue',
           r: selectedPageId,
           k: r
         },
         function(data) {
           jQuery('#event_path').html(selectedNode.join(':'));
           jQuery('#event_value').val(data);
           selectedNodeValue = data;
         }
       );
 
     })
+    .on('delete_node.jstree', function (e, data) {
+    
+      jQuery.post(
+        DOKU_BASE + 'lib/exe/ajax.php',
+        {
+          call : 'plugin_metaeditor',
+          q: 'deleteMetaValue',
+          r: selectedPageId,
+          k: {
+            key: selectedNodePath,
+            oldval: selectedNodeValue
+          },
+        },
+        function(data) {
+          alert(data[1]);
+          if(!data[0])
+          {
+            jQuery.post(
+              DOKU_BASE + 'lib/exe/ajax.php',
+              {
+                call: 'plugin_metaeditor', 
+                q: 'getMeta',
+                r: selectedPageId
+              },
+              function(data) {
+                jQuery('#metaTree').jstree(true).settings.core.data = data;
+                jQuery('#metaTree').jstree(true).refresh();
+              }
+            );
+          }
+        }
+      );
+    })
+    .on('create_node.jstree', function (e, data) {
+      alert('Create Node CB');
+    })
+    .on('rename_node.jstree', function (e, data) {
+      alert('Rename Node CB');
+    })
+    .on('move_node.jstree', function (e, data) {
+      alert('Move Node CB');
+    })
+    .on('copy_node.jstree', function (e, data) {
+      alert('Copy node CB');
+    })
     // create the instance
     .jstree({
       core : {
-        multiple: false
+        multiple: false,
+        check_callback: function (op, node, par, pos, more) {
+          if(op === "delete_node") { return confirm("Are you sure you want to delete?"); }
+        }
       },
-      plugins: ["wholerow"]
+      plugins: ["wholerow", "contextmenu"]
     });
 
 
     jQuery('#fileTree').on('changed.jstree', function (e, data) {
       var i, j, r;
       if(data.selected.length != 1)
         return;
       var node = data.instance.get_node(data.selected[0]);
       if(!data.instance.is_leaf(node))
         return;
       r = node.text;
       selectedPageId = r;      
       jQuery.post(
         DOKU_BASE + 'lib/exe/ajax.php',
         {
           call: 'plugin_metaeditor', 
           q: 'getMeta',
           r: r
         },
         function(data) {
           jQuery('#metaTree').jstree(true).settings.core.data = data;
           jQuery('#metaTree').jstree(true).refresh();
         }
       );
       
     })
     // create the instance
     .jstree({
       core : {
         multiple: false
       },
       plugins: ["wholerow"]
     
     });
     
     
 });