How to get the id of checkbox in gridvew in jquery

Here a jquery on click method is used to get the id of checkbox in the gridview.In this when ever click on the submit button the grid view id is pass to jquery variable and find the which check box is checked
Script:

$(document).ready(function () {
$("#sub").click(function () {
var $checkedChB = $('#').find("input:checkbox:checked");
});
});