Clicking on label doesn't trigger click event

This would be safer to use:

$(function() {

    $('input[type="checkbox"]').bind('change', function (v) {

        if($(this).is(':checked')) {
            $(this).parent().addClass('active');
        } else {
            $(this).parent().removeClass('active');
        }
    });

});

Using change instead of click allows for people that navigate forms using the keyboard.