Web Popup Don't Close on Back Button

I'm not sure if this topic has been addressed before but I had a very urgent question. How can I make it so that a Webpopup will not close if the user clicks the hardware soft key on Android. Here is my code, and I've tried returning true and false and neither work. I really need your guys help. Thanks

local function exitWeb(e)
                        if(e.phase == "ended") then
                                native.cancelWebPopup(popup)
                                xpic:removeSelf()
                                web:removeSelf()
                                transition.to(menubutton, {time=1, x = _W/1.1})
                                mode = 3
                                return true
                        end
                        return true
                end
                xpic:addEventListener("touch", exitWeb)
                transition.to(menubutton, {time=1, x = -50})
                popup = native.showWebPopup( 20, 50, 275, 400,  s.t.itemURL, {} )

views:1474 update：2012/1/4 9:12:54


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