Row Selector - How to set onclick event handler?

I have a master-detail set of forms and would like to respond to the onclick event of the row selector. When I go to the column attributes of the row selector I don't see anywhere to set the onclick event.
The other tabular form elements have an "Element Attributes" field that I normally use, but the row selector does not. Am I simply missing something?
I'm open to alternatives as well. The reality is, however, I don't need anything complicated or sophisticated. When the user clicks the box I gather some data from the current row and initiate an AJAX call. I don't need to submit the page, etc.
Thanks,
Brent

I think that the only way to do that is to use the apex_item package like this:
http://htmldb.oracle.com/pls/otn/f?p=31517:170
The standard row selector doesn't have an option for attaching javascript code to it.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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