google的js库：channel.js。因为很多地方访问google很吃力啊。最开始就是这个js没有加载完郁闷了很久，还一直以为是代码写错了。(Google's JS Library: channel.js. Because it's hard to visit Google in many places. This is the beginning of the JS did not load finished, depressed for a long time, but also has been thinking that the code is wrong.)