长轮询

http://www.web-tinker.com/article/20046.html

http://www.cnblogs.com/McJeremy/archive/2011/03/14/1983281.html

http://www.oseye.net/user/kevin/blog/78

http://blog.sina.com.cn/s/blog_912389e501015hi5.html

http://tech.ddvip.com/2010-10/1287987679161456.html

http://developer.51cto.com/art/201003/189261.htm

http://net.tutsplus.com/tutorials/javascript-ajax/start-using-html5-websockets-today/

http://blog.bingo929.com/html5-websockets.html

http://www.cnblogs.com/hebeiDGL/archive/2012/09/28/2707027.html

http://www.kuqin.com/webpagedesign/20120808/324132.html

http://www.kuqin.com/webpagedesign/20120807/324101.html