editing jstl values with the click of a button

The following is the jsp page created to show records of messages and comments in a social networking app.

http://ift.tt/1yG7Xzg

![message along with like and flag values and their buttons][1]

My question is that with the click of the like and flag buttons the values for like and flag for the respective comment/message should increment automatically. Basically it is clicking the button and updating jstl record.

I don't know how to go about... any pointers on how to achieve this???