--- admin_menu.js	2008-09-09 01:02:26.000000000 +0200
+++ /Volumes/www-1/php/drupal-6.6/sites/all/modules/admin_menu/admin_menu.js	2008-11-08 20:00:27.000000000 +0100
@@ -35,4 +35,129 @@ $(document).ready(function() {
       uls.css({left: '-999em', display: 'none'});
     }, 400);
   });
+
+  (function(){
+    
+    var adminMenu = jQuery("#admin-menu");
+    
+    var tree = jQuery.map(adminMenu.find("> ul > li.expandable"), function(element, index){
+      var _this = jQuery(element);
+      var tree = {
+        li: _this,
+        a: _this.find("> a") 
+      };
+      
+      var children;
+      if((children = _this.find("> ul > li")).length) {
+       tree.children = jQuery.map(children, arguments.callee);
+      }
+      return tree;
+    });
+    
+
+    (function (array, parent, parentIndex, level){ // create object parents
+      var level = level || 1;
+      for (var i = 0; i < array.length; i++){
+        var object = array[i]; 
+        object.level = level;
+        
+        if(object.children){
+          arguments.callee(object.children, object, i, level+1);
+        }
+        
+        if(parent) object.parent = parent;
+        object.parentIndex = parentIndex || i;
+        object.index = i;
+      };
+    })(tree);
+    
+
+    var active = false;
+    var current;
+    
+    jQuery(document).bind("keydown", function(event) {
+      // is key left, top, right, down or escape is presed
+      if(!(event.keyCode == 37 || event.keyCode == 38 || event.keyCode == 39 || event.keyCode == 40 || event.keyCode == 27)) return true;
+      
+      // does this key activates or disables keyboard navigation
+      if(event.keyCode == 27) {
+        active = !active;
+        if(!active){
+          adminMenu.find("li.expandable").trigger("mouseleave");
+          current.li.removeClass("focused");
+          current.a.blur();
+          current = undefined;
+          return false;
+        }
+      }
+      if(!active) return false;
+      
+      // select first element on initialization
+      if(!current) current = tree[0];
+      
+      // placeholder
+      var next;
+      
+      switch(event.keyCode){
+        case 37: // key left presed
+          if(current.level == 1 && tree[current.parentIndex-1]) { // first level rules
+            next = tree[current.parentIndex-1];
+          } else if(current.level > 2){ // third+ levels rules
+            next = current.parent;
+          } else { // second level rules
+            next = tree[current.parent.parentIndex-1];
+          }
+        break;
+
+        case 38: // key up presed 
+          if(current.level == 1) {
+            next = current.children[current.children.length-1];
+          } else if(!(current.level == 2 && current.index == 0)) { // first level rules
+            next = current.parent.children[current.index-1];
+          } else if(current.level == 2 && current.index == 0){
+            next = current.parent;
+          }          
+        break;
+
+        case 39: // key right presed
+          if(current.level == 1 && tree[current.parentIndex+1]) { // first level rules
+            next = tree[current.parentIndex+1];
+          } else if (current.children){
+            next = current.children[0];
+          } else if(current.level == 2) {
+            next = tree[current.parent.parentIndex+1];
+          }          
+        break;
+        
+        case 40: // key down presed
+          if(current.level == 1 && tree[current.parentIndex].children) { // first level rules
+            next = tree[current.parentIndex].children[0];
+          } else {
+            next = current.parent.children[current.index+1];
+          }
+        break;
+      }
+      // fallback if next is not set
+      if(!next) next = current;
+      
+      current.li.removeClass("focused");
+      
+      if((next.level < current.level) || (!next.children && next.level == current.level)) {
+        current.li.trigger("mouseleave");
+      }
+      
+      next.li.addClass("focused");
+      next.a.focus();
+      next.li.trigger("mouseenter");
+      
+      current = next;
+      
+      event.preventDefault();
+      event.cancelBubble = true;
+      if (event.stopPropagation) event.stopPropagation();
+      return false;
+      
+    });
+    
+  })();
 });