var imgUrl = "图片地址";
    var lineLink = "网址";
    var descContent = '爱写什么写什么';
    var shareTitle = '爱写什么写什么';
    var appid = '';

    function shareFriend() {
        WeixinJSBridge.invoke('sendAppMessage',{
            "appid": appid,
            "img_url": imgUrl,
            "img_width": "200",
            "img_height": "200",
            "link": lineLink,
            "desc": descContent,
            "title": shareTitle
        }, function(res) {
            //_report('send_msg', res.err_msg);
        })
    }
    function shareTimeline() {
        WeixinJSBridge.invoke('shareTimeline',{
            "img_url": imgUrl,
            "img_width": "200",
            "img_height": "200",
            "link": lineLink,
            "desc": descContent,
            "title": shareTitle
        }, function(res) {
               //_report('timeline', res.err_msg);
        });
    }
    function shareWeibo() {
        WeixinJSBridge.invoke('shareWeibo',{
            "content": descContent,
            "url": lineLink,
        }, function(res) {
            //_report('weibo', res.err_msg);
        });
    }
    // 当微信内置浏览器完成内部初始化后会触发WeixinJSBridgeReady事件。
    document.addEventListener('WeixinJSBridgeReady', function onBridgeReady() {
        // 发送给好友
        WeixinJSBridge.on('menu:share:appmessage', function(argv){
            shareFriend();
        });
        // 分享到朋友圈
        WeixinJSBridge.on('menu:share:timeline', function(argv){
            shareTimeline();
        });
        // 分享到微博
        WeixinJSBridge.on('menu:share:weibo', function(argv){
            shareWeibo();
        });
    }, false);


  // 这里可以进行一些数据统计等
  $.ajax({

  });

PS 个人留用..................