README Update

Author: XuanmiaoG

README.md

@@ -4,9 +4,25 @@
  [![npm](https://img.shields.io/npm/l/express.svg)](https://github.com/xuanmiaog/hexo-baidu-url-push/blob/master/LICENSE) 
 [![](https://img.shields.io/badge/npm-package-brightgreen.svg)](https://www.npmjs.com/package/hexo-baidu-url-push)
 [![](https://img.shields.io/badge/Hexo-2.4%2B-brightgreen.svg)](http://hexo.io) 
+[![](https://img.shields.io/npm/dy/hexo-baidu-url-push?label=download)](https://www.npmjs.com/package/hexo-baidu-url-push)
 
 ## 简介
-![jspush](https://www.xuanmiao.info/2017/03/19/Hexo-Plugin-%E7%99%BE%E5%BA%A6%E9%93%BE%E6%8E%A5%E8%87%AA%E5%8A%A8%E6%8E%A8%E9%80%81%E5%B7%A5%E5%85%B7/jspush.JPG)
+
+ ```javascrips
+(function(){
+    var bp = document.createElement('script');
+    var curProtocol = window.location.protocol.split(':')[0];
+    if (curProtocol === 'https') {
+        bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';        
+    }
+    else {
+        bp.src = 'http://push.zhanzhang.baidu.com/push.js';
+    }
+    var s = document.getElementsByTagName("script")[0];
+    s.parentNode.insertBefore(bp, s);
+})();
+</script>
+```
 
 > 自动推送是百度站长平台为提高站点新增网页发现速度推出的工具，安装自动推送JS代码的网页，在页面被访问时，页面URL将立即被推送给百度。