Selecting an image

[xXziroXx]

How can I make so, say, upon clicking once on an image it sets players chat to "lol!"?


Here´s what I tried:

NPC Code:

---

new GuiShowImgCtrl("x_ShowImg_1"){

  x = 10, y = 10;

  image = "block.png";

}

---

and further down...

NPC Code:

---

function x_ShowImg_1.onSelected()

{

  player.chat = "lol!";

}

---

I have no clue if you can check a ShowImgCtrl at all, and if not; what should I use?