http://www.cnblogs.com/idare/archive/2009/04/06/1430086.html http://hi.baidu.com/xiaot86/blog/item/83aa82af0001fecb7dd92ae4.html http://blog.youkuaiyun.com/sx1989827/archive/2009/01/16/3794104.aspx 实现悬浮层: http://zhidao.baidu.com/question/81923420.html 获取对象坐标: http://www.blogjava.net/wufalong/articles/169274.html