mouse cordinates from click on gridview

[IanO]

Our project contains nested gridviews. Several of the nested gridviews
may be open at the same time.
When a user clicks on links on any of these rows, a div with a higher
z-order is made visible for data entry or editing. My goal is to
position this div relative to the row that experienced the click event.

Can you make any suggestions as to how we can determine the mouse
coordinates, or even just the row position, so we can reposition this
data entry/ edit div?

Thanks,
IanO