Disable or enable Submit button on Checkbox checked event

$(function() {
    $('#id_of_your_checkbox').click(function() {
        if ($(this).is(':checked')) {
            $('#id_of_your_button').attr('disabled', 'disabled');
        } else {
            $('#id_of_your_button').removeAttr('disabled');
        }
    });
});

And here's a live demo.