$.cookie('the_cookie');: return the value of the cookie
$.cookie('the_cookie', 'the_value');: set the value of a cookie
$.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });: create a cookie with all available options.
$.cookie('the_cookie', null);: delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain used when the cookie was set.