微信分享网页自定义分享标题，图片，说明

  <script src="/crowd/js/weixin_share.js"></script>
 $(document).ready(function () {
        wx_share_handle()
           });
  function wx_share_handle(){
        var imgUrl = "http://aa.aa.com/crowd/img/logo.jpg"
        var title = document.title
        var desc = "为老师送花";
        wx_share(title,desc,imgUrl)
    }