Prevent click behavior when clicking link or button in the node?

[Kjell Rilbe]

I need to place a button or link inside the title of some nodes, which is simple.

But when I click that button or link, the node also executes its ordinary click behavior (e.g. expand/collapse).

How can I prevent that?

I just want the button's or link's onclick event to fire, and then nothing else should happen.

Thanks,
Kjell