非模态窗口的使用，并在该窗口上建立多个窗口，2/4/6/8/12等，可定时切换窗口，达到一视图多窗口浏览-Non-modal window, use, and in the window to create multiple windows, 2/4/6/8/12, etc., can switch the window from time to time to achieve one view of multi-window browser