See the note at the end of the Properties table for an explanation. An indication as to which browsers the properties and methods work on is also given. If left blank, then that particular property or method should work on all browsers that support JavaScript. Property Summary for Window Object closed Boolean, Specifies whether a window has been closed. An array reflecting all the frames in a window.
Bold properties are settable and readable.
All others are readable but not settable. There is one exception. Status is settable but not readable. Undoes the last history step in any frame within the top-level window. Removes focus from the specified object.