how to send data back from client side to server side

Hello all,
I have a very small problem, but could not find the solution.
I have a link button on aspx page. I have some functionality in the link button's click event. I have some data on client side. I want those data from the client side to the server side when somebody click on the link button.For say, I have three datafields in javascript file, which contains data- eventid, date, name. Well, I don't know the AJAX tech., but I would like to implement it if somebody help me out in this problem.
Thanks,
Robin