Create a Menu for an RPG – Add Powerups, Weapons, and Armors - Unity 4 Game Development - page 122

Here, we just created the necessary variables for our menu window, as shown in
the following screenshot:
Note
The result of statBox1Texture , statBox2Texture , and skillBoxTexture will be
shown in the Creating the STATUS tab section.
4. Next, we will set _isMenuOpen to false in the Start() function, because
we don't want our menu to show until the player presses the M key, so type the
code as follows:
// Unity JavaScript user:
function Start () : void {
_isMenuOpen = false;
}