点击div以外的其他区域，div隐藏

HTML:  <div  class="doSure"></div>

js:

$(document).bind（'click'，function(event) {
    event.stopPropagation();
    if (!$('.doSure').is(event.target) && $('.doSure').has(event.target).length === 0) {
        $('.doSure').hide();
    }
});