How to make a simple crafting system? (JS)

Hi! im java scripter but not that good.Will you guys help me with this crafting system? like in java script. just a simple crafting GUI with button slots on it.
example : when the item click on the button it will craft an item.

You mean like this?

var item : Gameobject;
var camera : Gameobject;

function GUI {

item

arghh! (I DONT GET IT!)

can you guys fix this code?
the FUNCTION thing.

the gui is:

// Mess around with these values to specify the width, height, And position

var X : int = 15; // X position
var Y : int = 15; // Y position
var H : int = 200; // button height
var W : int = 100; // button width

//This Function allows the GUI
function OnGUI(){
// This line of code draws the button
GUI.Button(Rect(X,Y,H,W), "This is what the button will say")
}

Oh and Don’t forget to add this script to the camera thats in you’re scene.
By the way this is Javascript.