Let’s say you have a checkbox with the name ‘MyCheckBox”. Using JQuery, here’s a function you can use to be able to tell whether or not it’s checked:

    $(document).ready(function () {
        $("#MyCheckBox").click(function () {
            var chk=this.checked;
            if (chk==true)
            {alert("Mycheckbox is checked");}
            else
            {alert("Mycheckbox is NOT checked");}
        });
    });