diff --git a/mozilla/content/shared/public/nsXULAtomList.h b/mozilla/content/shared/public/nsXULAtomList.h
index 0cb5de8129a..d5d01cec2eb 100644
--- a/mozilla/content/shared/public/nsXULAtomList.h
+++ b/mozilla/content/shared/public/nsXULAtomList.h
@@ -81,6 +81,8 @@ XUL_ATOM(acceltext, "acceltext") // Text to use for the accelerator
 XUL_ATOM(popupset, "popupset") // Contains popup menus, context menus, and tooltips
 XUL_ATOM(popup, "popup") // The popup for a context menu, popup menu, or tooltip
 XUL_ATOM(menugenerated, "menugenerated") // Internal
+XUL_ATOM(popupanchor, "popupanchor") // Anchor for popups
+XUL_ATOM(popupalign, "popupalign") // Alignment for popups
 
 XUL_ATOM(key, "key") // A key element
 XUL_ATOM(broadcaster, "broadcaster") // A broadcaster
diff --git a/mozilla/layout/xul/base/src/nsMenuFrame.cpp b/mozilla/layout/xul/base/src/nsMenuFrame.cpp
index 3e8ae9c7f9b..e4cd44a24d4 100644
--- a/mozilla/layout/xul/base/src/nsMenuFrame.cpp
+++ b/mozilla/layout/xul/base/src/nsMenuFrame.cpp
@@ -518,11 +518,32 @@ nsMenuFrame::OpenMenuInternal(PRBool aActivateFlag)
         mMenuParent->SetActive(PR_TRUE);
 
       // Sync up the view.
+      nsCOMPtr<nsIContent> menuPopupContent;
+      menuPopup->GetContent(getter_AddRefs(menuPopupContent));
+
+      nsAutoString popupAnchor, popupAlign;
+      
+      menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupanchor, popupAnchor);
+      menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupalign, popupAlign);
+
       PRBool onMenuBar = PR_TRUE;
       if (mMenuParent)
         mMenuParent->IsMenuBar(onMenuBar);
 
-      menuPopup->SyncViewWithFrame(mPresContext, onMenuBar, this, -1, -1);
+      if (onMenuBar) {
+        if (popupAnchor == "")
+          popupAnchor = "bottomleft";
+        if (popupAlign == "")
+          popupAlign = "topleft";
+      }
+      else {
+        if (popupAnchor == "")
+          popupAnchor = "topright";
+        if (popupAlign == "")
+          popupAlign = "topleft";
+      }
+
+      menuPopup->SyncViewWithFrame(mPresContext, popupAnchor, popupAlign, this, -1, -1);
     }
 
     ActivateMenu(PR_TRUE);
@@ -650,11 +671,31 @@ nsMenuFrame::DidReflow(nsIPresContext* aPresContext,
   nsIFrame* frame = mPopupFrames.FirstChild();
   nsMenuPopupFrame* menuPopup = (nsMenuPopupFrame*)frame;
   if (mMenuOpen && menuPopup) {
+    nsCOMPtr<nsIContent> menuPopupContent;
+    menuPopup->GetContent(getter_AddRefs(menuPopupContent));
+    nsAutoString popupAnchor, popupAlign;
+      
+    menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupanchor, popupAnchor);
+    menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupalign, popupAlign);
+
     PRBool onMenuBar = PR_TRUE;
     if (mMenuParent)
       mMenuParent->IsMenuBar(onMenuBar);
 
-    menuPopup->SyncViewWithFrame(aPresContext, onMenuBar, this, -1, -1);
+    if (onMenuBar) {
+      if (popupAnchor == "")
+          popupAnchor = "bottomleft";
+      if (popupAlign == "")
+          popupAlign = "topleft";
+    }
+    else {
+      if (popupAnchor == "")
+        popupAnchor = "topright";
+      if (popupAlign == "")
+        popupAlign = "topleft";
+    }
+
+    menuPopup->SyncViewWithFrame(aPresContext, popupAnchor, popupAlign, this, -1, -1);
   }
 
   return rv;
diff --git a/mozilla/layout/xul/base/src/nsMenuPopupFrame.cpp b/mozilla/layout/xul/base/src/nsMenuPopupFrame.cpp
index f5a57de96de..497daf0162d 100644
--- a/mozilla/layout/xul/base/src/nsMenuPopupFrame.cpp
+++ b/mozilla/layout/xul/base/src/nsMenuPopupFrame.cpp
@@ -213,7 +213,8 @@ nsMenuPopupFrame::GetNearestEnclosingView(nsIPresContext* aPresContext, nsIFrame
 
 nsresult 
 nsMenuPopupFrame::SyncViewWithFrame(nsIPresContext* aPresContext,
-                                    PRBool aOnMenuBar, 
+                                    const nsString& aPopupAnchor,
+                                    const nsString& aPopupAlign,
                                     nsIFrame* aFrame, 
                                     PRInt32 aXPos, PRInt32 aYPos)
 {
@@ -266,13 +267,41 @@ nsMenuPopupFrame::SyncViewWithFrame(nsIPresContext* aPresContext,
     ypos = NSIntPixelsToTwips(aYPos, p2t);
     xpos += offset.x;
     ypos += offset.y;
-  } else if (aOnMenuBar) {
+  } 
+  else {
     xpos = parentPos.x + offset.x;
-    ypos = parentPos.y + parentRect.height + offset.y;
-  } else {
-    xpos = parentPos.x + parentRect.width + offset.x;
     ypos = parentPos.y + offset.y;
+
+    if (aPopupAnchor == "topright" && aPopupAlign == "topleft") {
+      xpos += parentRect.width;
+    }
+    else if (aPopupAnchor == "topright" && aPopupAlign == "bottomright") {
+      xpos -= (mRect.width - parentRect.width);
+      ypos -= mRect.height;
+    }
+    else if (aPopupAnchor == "bottomright" && aPopupAlign == "bottomleft") {
+      xpos += parentRect.width;
+      ypos -= (mRect.height - parentRect.height);
+    }
+    else if (aPopupAnchor == "bottomright" && aPopupAlign == "topright") {
+      xpos -= (mRect.width - parentRect.width);
+      ypos += parentRect.height;
+    }
+    else if (aPopupAnchor == "topleft" && aPopupAlign == "topright") {
+      xpos -= mRect.width;
+    }
+    else if (aPopupAnchor == "topleft" && aPopupAlign == "bottomleft") {
+      ypos -= mRect.height;
+    }
+    else if (aPopupAnchor == "bottomleft" && aPopupAlign == "bottomright") {
+      xpos -= mRect.width;
+      ypos -= (mRect.height - parentRect.height);
+    }
+    else if (aPopupAnchor == "bottomleft" && aPopupAlign == "topleft") {
+      ypos += parentRect.height;
+    }
   }
+  
   viewManager->MoveViewTo(view, xpos, ypos);
 
   // Check if we fit on the screen, if not, resize and/or move so we do
diff --git a/mozilla/layout/xul/base/src/nsMenuPopupFrame.h b/mozilla/layout/xul/base/src/nsMenuPopupFrame.h
index 9484098f369..7b4dd08752b 100644
--- a/mozilla/layout/xul/base/src/nsMenuPopupFrame.h
+++ b/mozilla/layout/xul/base/src/nsMenuPopupFrame.h
@@ -91,7 +91,8 @@ public:
   void GetViewOffset(nsIViewManager* aManager, nsIView* aView, nsPoint& aPoint);
   static void GetNearestEnclosingView(nsIPresContext* aPresContext, nsIFrame* aStartFrame, nsIView** aResult);
 
-  nsresult SyncViewWithFrame(nsIPresContext* aPresContext, PRBool aOnMenuBar, 
+  nsresult SyncViewWithFrame(nsIPresContext* aPresContext, const nsString& aPopupAnchor,
+                             const nsString& aPopupAlign,
                              nsIFrame* aFrame, PRInt32 aXPos, PRInt32 aYPos);
 
   NS_IMETHOD CaptureMouseEvents(nsIPresContext* aPresContext, PRBool aGrabMouseEvents);
diff --git a/mozilla/layout/xul/base/src/nsPopupSetFrame.cpp b/mozilla/layout/xul/base/src/nsPopupSetFrame.cpp
index 52724b9ffb0..b35bad19bc4 100644
--- a/mozilla/layout/xul/base/src/nsPopupSetFrame.cpp
+++ b/mozilla/layout/xul/base/src/nsPopupSetFrame.cpp
@@ -248,7 +248,20 @@ nsPopupSetFrame::DidReflow(nsIPresContext* aPresContext,
   // Sync up the view.
   nsIFrame* activeChild = GetActiveChild();
   if (activeChild) {
-    ((nsMenuPopupFrame*)activeChild)->SyncViewWithFrame(aPresContext, PR_TRUE, mElementFrame, mXPos, mYPos);
+
+    nsCOMPtr<nsIContent> menuPopupContent;
+    activeChild->GetContent(getter_AddRefs(menuPopupContent));
+    nsAutoString popupAnchor, popupAlign;
+      
+    menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupanchor, popupAnchor);
+    menuPopupContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::popupalign, popupAlign);
+
+    if (popupAnchor == "")
+      popupAnchor = "bottomleft";
+    if (popupAlign == "")
+      popupAlign = "topleft";
+   
+    ((nsMenuPopupFrame*)activeChild)->SyncViewWithFrame(aPresContext, popupAnchor, popupAlign, mElementFrame, mXPos, mYPos);
   }
 
   return nsBoxFrame::DidReflow(aPresContext, aStatus);
diff --git a/mozilla/layout/xul/content/src/nsXULAtomList.h b/mozilla/layout/xul/content/src/nsXULAtomList.h
index 0cb5de8129a..d5d01cec2eb 100644
--- a/mozilla/layout/xul/content/src/nsXULAtomList.h
+++ b/mozilla/layout/xul/content/src/nsXULAtomList.h
@@ -81,6 +81,8 @@ XUL_ATOM(acceltext, "acceltext") // Text to use for the accelerator
 XUL_ATOM(popupset, "popupset") // Contains popup menus, context menus, and tooltips
 XUL_ATOM(popup, "popup") // The popup for a context menu, popup menu, or tooltip
 XUL_ATOM(menugenerated, "menugenerated") // Internal
+XUL_ATOM(popupanchor, "popupanchor") // Anchor for popups
+XUL_ATOM(popupalign, "popupalign") // Alignment for popups
 
 XUL_ATOM(key, "key") // A key element
 XUL_ATOM(broadcaster, "broadcaster") // A broadcaster