Shoot-Em Up game

I am attempting to make a shoot-em up game. I have made the crosshair follow the curser but I am not sure what the code is for when I click on the target.

I need the target to disappear when I click it...
And when you shoot the last target, it will move on to the next frame

Anyone have any idea of the code??

Thanks
Simon

To move a target when you click it you could make _x=2000;
as this will put it off the stage.

And when you click the last target you could put
goto frame in.