diff --git a/dom/public/base/nsIDOMWindow.h b/dom/public/base/nsIDOMWindow.h
index 32b45295f96a..595c7175f723 100644
--- a/dom/public/base/nsIDOMWindow.h
+++ b/dom/public/base/nsIDOMWindow.h
@@ -139,6 +139,8 @@ public:
 
   NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment)=0;
 
+  NS_IMETHOD    CreateAnchoredPopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, const nsString& aAnchorAlignment, const nsString& aPopupType, const nsString& aPopupAlignment)=0;
+
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn)=0;
 
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn)=0;
@@ -201,6 +203,7 @@ public:
   NS_IMETHOD    SetTimeout(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn);  \
   NS_IMETHOD    SetInterval(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn);  \
   NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment);  \
+  NS_IMETHOD    CreateAnchoredPopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, const nsString& aAnchorAlignment, const nsString& aPopupType, const nsString& aPopupAlignment);  \
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn);  \
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn);  \
 
@@ -262,6 +265,7 @@ public:
   NS_IMETHOD    SetTimeout(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn) { return _to SetTimeout(cx, argv, argc, aReturn); }  \
   NS_IMETHOD    SetInterval(JSContext *cx, jsval *argv, PRUint32 argc, PRInt32* aReturn) { return _to SetInterval(cx, argv, argc, aReturn); }  \
   NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, PRInt32 aXPos, PRInt32 aYPos, const nsString& aPopupType, const nsString& aPopupAlignment) { return _to CreatePopup(aElement, aPopupContent, aXPos, aYPos, aPopupType, aPopupAlignment); }  \
+  NS_IMETHOD    CreateAnchoredPopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, const nsString& aAnchorAlignment, const nsString& aPopupType, const nsString& aPopupAlignment) { return _to CreateAnchoredPopup(aElement, aPopupContent, aAnchorAlignment, aPopupType, aPopupAlignment); }  \
   NS_IMETHOD    Open(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn) { return _to Open(cx, argv, argc, aReturn); }  \
   NS_IMETHOD    OpenDialog(JSContext *cx, jsval *argv, PRUint32 argc, nsIDOMWindow** aReturn) { return _to OpenDialog(cx, argv, argc, aReturn); }  \
 
diff --git a/dom/public/idl/base/Window.idl b/dom/public/idl/base/Window.idl
index 2317e35309be..5aab6e08ba94 100644
--- a/dom/public/idl/base/Window.idl
+++ b/dom/public/idl/base/Window.idl
@@ -52,6 +52,10 @@
 					     in long xPos, in long yPos, 
 						 in DOMString popupType, in DOMString popupAlignment);
 
+		void createAnchoredPopup(in Element element, in Element popupContent,
+								 in DOMString anchorAlignment,
+								 in DOMString popupType, in DOMString popupAlignment);
+								  
         Window open(/* ... */);
         Window openDialog(/* ... */);
       };
diff --git a/dom/src/base/nsGlobalWindow.cpp b/dom/src/base/nsGlobalWindow.cpp
index 2ed8c95a103d..77b0b6dae34d 100644
--- a/dom/src/base/nsGlobalWindow.cpp
+++ b/dom/src/base/nsGlobalWindow.cpp
@@ -1636,6 +1636,14 @@ GlobalWindowImpl::CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupCont
   return NS_OK;
 }
 
+NS_IMETHODIMP
+GlobalWindowImpl::CreateAnchoredPopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, 
+                              const nsString& anAnchorAlignment,
+                              const nsString& aPopupType, const nsString& aPopupAlignment)
+{
+  return NS_OK;
+}
+
 nsresult 
 GlobalWindowImpl::CheckWindowName(JSContext *cx, nsString& aName)
 {
diff --git a/dom/src/base/nsGlobalWindow.h b/dom/src/base/nsGlobalWindow.h
index b106cb76cf20..05c99a7b06ec 100644
--- a/dom/src/base/nsGlobalWindow.h
+++ b/dom/src/base/nsGlobalWindow.h
@@ -152,6 +152,10 @@ public:
   NS_IMETHOD    CreatePopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, 
                             PRInt32 aXPos, PRInt32 aYPos, 
                             const nsString& aPopupType, const nsString& aPopupAlignment);
+
+  NS_IMETHOD    CreateAnchoredPopup(nsIDOMElement* aElement, nsIDOMElement* aPopupContent, 
+                            const nsString& anAnchorAlignment,
+                            const nsString& aPopupType, const nsString& aPopupAlignment);
     
   // nsIDOMEventCapturer interface
   NS_IMETHOD    CaptureEvent(const nsString& aType);
diff --git a/dom/src/base/nsJSWindow.cpp b/dom/src/base/nsJSWindow.cpp
index 5c1e3981334f..68703be8d2d3 100644
--- a/dom/src/base/nsJSWindow.cpp
+++ b/dom/src/base/nsJSWindow.cpp
@@ -1416,6 +1416,66 @@ WindowCreatePopup(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *
 }
 
 
+//
+// Native method CreateAnchoredPopup
+//
+PR_STATIC_CALLBACK(JSBool)
+WindowCreateAnchoredPopup(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
+{
+  nsIDOMWindow *nativeThis = (nsIDOMWindow*)JS_GetPrivate(cx, obj);
+  JSBool rBool = JS_FALSE;
+  nsIDOMElementPtr b0;
+  nsIDOMElementPtr b1;
+  nsAutoString b2;
+  nsAutoString b3;
+  nsAutoString b4;
+
+  *rval = JSVAL_NULL;
+
+  // If there's no private data, this must be the prototype, so ignore
+  if (nsnull == nativeThis) {
+    return JS_TRUE;
+  }
+
+  if (argc >= 5) {
+
+    if (JS_FALSE == nsJSUtils::nsConvertJSValToObject((nsISupports **)&b0,
+                                           kIElementIID,
+                                           "Element",
+                                           cx,
+                                           argv[0])) {
+      return JS_FALSE;
+    }
+
+    if (JS_FALSE == nsJSUtils::nsConvertJSValToObject((nsISupports **)&b1,
+                                           kIElementIID,
+                                           "Element",
+                                           cx,
+                                           argv[1])) {
+      return JS_FALSE;
+    }
+
+    nsJSUtils::nsConvertJSValToString(b2, cx, argv[2]);
+
+    nsJSUtils::nsConvertJSValToString(b3, cx, argv[3]);
+
+    nsJSUtils::nsConvertJSValToString(b4, cx, argv[4]);
+
+    if (NS_OK != nativeThis->CreateAnchoredPopup(b0, b1, b2, b3, b4)) {
+      return JS_FALSE;
+    }
+
+    *rval = JSVAL_VOID;
+  }
+  else {
+    JS_ReportError(cx, "Function createAnchoredPopup requires 5 parameters");
+    return JS_FALSE;
+  }
+
+  return JS_TRUE;
+}
+
+
 //
 // Native method Open
 //
@@ -1763,6 +1823,7 @@ static JSFunctionSpec WindowMethods[] =
   {"setTimeout",          WindowSetTimeout,     0},
   {"setInterval",          WindowSetInterval,     0},
   {"createPopup",          WindowCreatePopup,     6},
+  {"createAnchoredPopup",          WindowCreateAnchoredPopup,     5},
   {"open",          WindowOpen,     0},
   {"openDialog",          WindowOpenDialog,     0},
   {"captureEvent",          EventCapturerCaptureEvent,     1},