Millisecond Forums

Is it possible to record multiple clicks on a single picture, together with the x and y position coordinates for each time?
In my task the participant has to spot one or more changes in a picture. After presenting the second picture, he is supposed to click on the respective area.

I already searched for a solution and found a similar problem here (http://www.millisecond.com/forums/Topic939.aspx?Keywords=record-click-position-coordinates) but I can't transfer the solution to my problem.

I hope someone is able to help me.

Thanks,
Dominik