How do I disable mouse or touch on a sprite button

I have a sprite that I am using as a button. I want to make sure the button can only be clicked once, until a certain condition is met (it's an ajax call). How can I ignore (or disable) any additional clicks on the button, until my ajax request finishes (or times out)? OR, is there a different best practice for this?

try a boolean instance variable in that sprite. then go to "set boolean" to enable or disable the action

make an instance variable in the sprite button i.e. "enabled". and just add a condition to your Mouse On Clicked Event.

On Mouse Clicked Object

AND

Button Is enabled

{

button click code

}