Function to not repeat image

Hi, I’m new in using Corona SDK … I hope that my request is not stupid! I’m working for a game (usually candycrash) If you end the 10th level, displays an image promotion (h_img), pressing the picture you get to the facebook page (h_link). I’ll explain…

if self.level == 5 then

        h_img = “immage01.png”

        h_link = "https://www.facebook.com/link"

end

    

local houseAdsGroup = display.newGroup()

self.parent:insert(houseAdsGroup)

local houseAds = display.newImageRect(“images/background/”…h_img, G_MAX_WIDTH, G_MAX_HEIGHT)

houseAds.x, houseAds.y = display.contentCenterX, display.contentCenterY

houseAdsGroup:insert(houseAds)

local function onBannerTouch( event )

if event.phase == “began” then

system.openURL(h_link)

return true

end

end

I wish that the player can go to the link once, if repeated the 10th level has to find another image and the link disappears.

I searched around but I can not find a function … <_<

A help would be really grateful!

Sorry for my English …

Good luck to all the Forum!