bug 142215 - Personal Toolbar folders should work like main menu (open on mouseover), p=paradigmk@technodrome.com r=Neil

suite/common/bookmarks/bookmarksMenu.js

@@ -724,6 +724,31 @@ var BookmarksMenuDNDObserver = {
 
 var BookmarksToolbar = 
 {
+  /////////////////////////////////////////////////////////////////////////////
+  // make bookmarks toolbar act like menus
+  openMenuButton: null,
+  autoOpenMenu: function (aTarget)
+  {
+    if (this.openMenuButton &&
+        this.openMenuButton != aTarget &&
+        aTarget.localName == "toolbarbutton" &&
+        (aTarget.type == "menu" ||
+         aTarget.type == "menu-button")) {
+      this.openMenuButton.open = false;
+      aTarget.open = true;
+    }
+  },
+  onMenuOpen: function (aTarget)
+  {
+    if (aTarget.parentNode.localName == "toolbarbutton")
+      this.openMenuButton = aTarget.parentNode;
+  },
+  onMenuClose: function (aTarget)
+  {
+    if (aTarget.parentNode.localName == "toolbarbutton")
+      this.openMenuButton = null;
+  },
+
   /////////////////////////////////////////////////////////////////////////////
   // returns the node of the last visible bookmark on the toolbar -->
   getLastVisibleBookmark: function ()