how to add control value to List using jquerry

Hi,

I am using ASP.NET MVC3 using C#.

I want to add a value to Hashset using Jquerry..

here is my code..

Model:

public Hashset selection= new Hashset()

View:

@model.HiddenFor(m=>m.selection)

function Checkbox() {

$('#checkboxes input:checked').each(function () {

switch ($(this).attr("id")) {

case "input_check_bundle_mobility":

$("#IsMoblitySelected").val('true');
$('#selection').val('mobility added');

break;

case "input_check_bundle_internet":

$("#IsInternetSelected").val('true');

break;