Web page java table

is there some way to click on a specific cell of a java table on a webpage not using relative position?

I have a web based ticketing/emailing system and the layout is defined as a dynamic java table.
First five rows are some headers on the sixth row starts the list of emails. Each row contains sevaral columns (checkbox, ID, date, subject, etc.) and I need to open the first mail cliking on the subject (i.e. row 6 column 5 in the table). How to do this?