选中radio后，给标签加上类名，选中别的radio后，类名也跟随加上怎么实现 JS或JQ都行

Question

 <ul class="more_address_hidn">
            <li>
                <span>
                    <input type="radio" name="identity" value />
                    1111111111111111111
                </span>
            </li>
            <li>
                <span>
                    <input type="radio" name="identity" value />
                    22222222222222222222
                </span>
            </li>
            <li>
                <span>
                    <input type="radio" name="identity" value />
                    3333333333333333333
                </span>
            </li>
        </ul>

选中radio后 给li加一个类名，选中别的，类名跟随

自己写了个JQ的代码，但是实在SPAN标签上加的，并且不跟随

 $(function(){
    $(".add_stn input").change(function(){
        $(":checked").parent().addClass("set1").siblings().removeClass("set1");
    });
});

Answer 1

 <ul class="more_address_hidn">
    <li>
        <span>
            <input type="radio" name="identity" value />
            1111111111111111111
        </span>
    </li>
    <li>
        <span>
            <input type="radio" name="identity" value />
            22222222222222222222
        </span>
    </li>
    <li>
        <span>
            <input type="radio" name="identity" value />
            3333333333333333333
        </span>
    </li>
</ul>
<script type="text/javascript" src="http://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
    $('.more_address_hidn input').click(function () {
        $('.more_address_hidn >li').removeClass('set1');
        $(this).closest('li').addClass('set1')
    });
</script>