http://www.cnblogs.com/laogao/archive/2012/07/14/2591179.html
http://www.w3school.com.cn/jsref/event_screeny.asp
3、clientX, clientY,offsetX, offsetY,screenX, screenY, x, y
http://www.cnblogs.com/mingforyou/p/4105600.html
http://www.cnblogs.com/xiaopin/archive/2012/03/26/2418152.html
http://www.jb51.net/article/41410.htm
http://www.cnblogs.com/luluping/archive/2010/07/16/1778766.html
原文:http://www.cnblogs.com/zxmbest1/p/5045744.html