html & [removed] How to store data referring to html elements

Question

I\'m working on a web application that uses ajax to communicate to the server. My specific situation is the following:

I have a list of users lined out in the html p

Answer 1

There is jQuery's data function

$('li').data('userid',uid); // sets the value of userid
uid = $('li').data('userid'); // retrieves the value of userid

official documentation: http://docs.jquery.com/Data