diff --git a/xpfe/appshell/src/nsWebShellWindow.cpp b/xpfe/appshell/src/nsWebShellWindow.cpp
index 5f5221021ad0..9205f6688f5e 100644
--- a/xpfe/appshell/src/nsWebShellWindow.cpp
+++ b/xpfe/appshell/src/nsWebShellWindow.cpp
@@ -175,6 +175,9 @@ static NS_DEFINE_IID(kIUrlDispatcherIID,     NS_IURLDISPATCHER_IID);
 #define DEBUG_MENUSDEL 1
 #endif
 
+static NS_DEFINE_IID(kINetSupportIID, NS_INETSUPPORT_IID);
+#include "nsINetSupportDialogService.h"
+static NS_DEFINE_CID(kNetSupportDialogCID, NS_NETSUPPORTDIALOG_CID);
 #include "nsIWebShell.h"
 
 const char * kThrobberOnStr  = "resource:/res/throbber/anims07.gif";
@@ -299,7 +302,11 @@ nsWebShellWindow::QueryInterface(REFNSIID aIID, void** aInstancePtr)
      NS_ADDREF_THIS();
      return NS_OK;
   }	
-  
+  if (aIID.Equals(kINetSupportIID )) {
+    *aInstancePtr = (void*)(nsINetSupport*)this;
+    NS_ADDREF_THIS();
+    return NS_OK;
+  }
   if (aIID.Equals(kISupportsIID)) {
     *aInstancePtr = (void*)(nsISupports*)(nsIWebShellContainer*)this;
     NS_ADDREF_THIS();
@@ -2840,3 +2847,68 @@ nsWebShellWindow::IsIntrinsicallySized(PRBool& aResult)
   aResult = mIntrinsicallySized;
   return NS_OK;
 }
+
+
+// nsINetSupport
+void nsWebShellWindow::Alert(const nsString &aText)
+{
+	nsresult rv;
+	NS_WITH_SERVICE(nsINetSupportDialogService, dialog, kNetSupportDialogCID, &rv);
+  
+  if ( dialog )
+   	dialog->Alert( aText );  
+}
+
+PRBool nsWebShellWindow::Confirm(const nsString &aText)
+{
+	nsresult rv;
+	NS_WITH_SERVICE(nsINetSupportDialogService, dialog, kNetSupportDialogCID, &rv);
+  PRInt32 result = 0;
+ 
+  if ( dialog )
+   	dialog->Confirm( aText,&result );  
+  return result ? PR_TRUE : PR_FALSE;
+}
+
+PRBool nsWebShellWindow::Prompt(const nsString &aText,
+                           const nsString &aDefault,
+                           nsString &aResult)
+{
+	nsresult rv;
+	NS_WITH_SERVICE(nsINetSupportDialogService, dialog, kNetSupportDialogCID, &rv);
+	PRInt32 result = 0;
+  if ( dialog )
+  {
+   	dialog->Prompt( aText, aDefault, aResult,&result ); 
+	}
+	 return result ? PR_TRUE : PR_FALSE;
+}
+
+PRBool nsWebShellWindow::PromptUserAndPassword(
+				const nsString &aText, nsString &aUser, nsString &aPassword)
+{
+	nsresult rv;
+	NS_WITH_SERVICE(nsINetSupportDialogService, dialog, kNetSupportDialogCID, &rv);
+	PRInt32 result = 0;
+  if ( dialog )
+  {
+   		dialog->PromptUserAndPassword( aText, aUser, aPassword, &result );  
+
+	}
+	 return result ? PR_TRUE : PR_FALSE;
+}
+
+PRBool nsWebShellWindow::PromptPassword(const nsString &aText,
+                                   nsString &aPassword)
+ {
+ 	nsresult rv;
+ 	NS_WITH_SERVICE(nsINetSupportDialogService, dialog, kNetSupportDialogCID, &rv);
+	PRInt32 result = 0;
+  if ( dialog )
+  {
+  	
+   	dialog->PromptPassword( aText, aPassword, &result ); 
+   
+	}
+	 return result ? PR_TRUE : PR_FALSE;
+ }
diff --git a/xpfe/appshell/src/nsWebShellWindow.h b/xpfe/appshell/src/nsWebShellWindow.h
index 89af81d76695..086b8cc87332 100644
--- a/xpfe/appshell/src/nsWebShellWindow.h
+++ b/xpfe/appshell/src/nsWebShellWindow.h
@@ -30,7 +30,7 @@
 #include "nsVoidArray.h"
 #include "nsIMenu.h"
 #include "nsIUrlDispatcher.h"
-
+#include "nsINetSupport.h"
 // can't use forward class decl's because of template bugs on Solaris 
 #include "nsIDOMDocument.h"
 #include "nsIDOMNode.h"
@@ -59,7 +59,8 @@ class nsWebShellWindow : public nsIWebShellWindow,
                          public nsIBrowserWindow,
                          public nsIDocumentLoaderObserver,
                          public nsIDocumentObserver,
-						 public nsIUrlDispatcher
+						 public nsIUrlDispatcher,
+						  public nsINetSupport
 {
 public:
   nsWebShellWindow();
@@ -248,7 +249,17 @@ public:
   NS_IMETHOD ShowMenuBar(PRBool aShow);
 
   NS_DECL_IURLDISPATCHER
-
+  // nsINetSupport
+  NS_IMETHOD_(void) Alert(const nsString &aText);  
+  NS_IMETHOD_(PRBool) Confirm(const nsString &aText);
+  NS_IMETHOD_(PRBool) Prompt(const nsString &aText,
+                             const nsString &aDefault,
+                             nsString &aResult);
+  NS_IMETHOD_(PRBool) PromptUserAndPassword(const nsString &aText,
+                                            nsString &aUser,
+                                            nsString &aPassword);
+  NS_IMETHOD_(PRBool) PromptPassword(const nsString &aText,
+                                     nsString &aPassword); 
 protected:
   void ExecuteJavaScriptString(nsString& aJavaScript);