How to decorate a row in table using displaytag

Question

I am using display tag to display values in a table. I want to color a specific row in the table based on the values in the column say 'Y' then color row with red color. How can i do this? I have been looking up the documentation for display tag which uses decorator class and addRowClass() method, but its too confusing. Is there a method to do this using JavaScript?