How do I get a click event for top sprite

Have overlapping sprites, I only want the 'on object clicked' to fire for the top most one, currently it fires for every object under the mouse. EX: Clicking on a UI elements still fires the click event for the background object.

I should have said, the two overlapping images are different objects types, not different instances of the same object. One is a 9-split and one is a tile grid. I really did spend about an hour searching google for an example on how to do it. I think I can make it work with a global variable and an on tick event, but I was hoping for a more elegant solution.

That's pretty much what you have to do.

Ok, thanks. I will test when I get home and let you know.