Provide a toggle for click map to show the on-click values. This would function as onclick debugger. It is both a QA tool and conveniently shows the values for the link IDs we need to track.
Currently, we have built our own tool (see image below) to see the on click values in a mouse over. Our people responsible for tracking go to the page to find what links are there and get the values, which are tracked in Omniture.