I hope this is Window.Open () Open the full-screen Fullscreen full screen window without prompting the perfect solution for the parent window: We usually use the control method, put one in the parent window: object> then child window closewin.click () is not prompted to close the parent window . This is: This is an control of Outlook. Some friends are used to using clients such as Foxmail, when the Windows is fired, they don't have Outlook, which will not have effect. The current solution is to let the parent window to declare the child window, and the "virtual parent window" of this original parent window does not exist, and the declaration of null is ok, so since the original Father window It's easy to use Window.close () to close him so convenient. If you don't have to worry about it, you will have a message when I write code, and the result is positive: D! I only tested in IE6, no other compatibility test ~~~ POPOEVER Click here to close span> body> ',' ',' fullscreen '); cw.resizeto (400, 300); cw.moveto (Screen.Width / 2-200, Screen.Height / 2-150); Opener = 'POPO'; Window.close (); "> body>