原生js一里边还有很多二三等http://www.cnblogs.com/charling/p/3527561.html

选区器 http://wenku.baidu.com/link?url=zr2n0qHcXqDtFuKmDy_K5DDnUeY4HIHHTnhAve9GTewQvrdysIjvQNPy9Ji5b5xtxdbprh7oi-o05F6E-99ONksQsk5LcBHRVYU7VA5v7IS

http://www.jb51.net/article/56316.htm

http://www.w3cmark.com/2016/443.html