javascript window opener

This is an object reference to the window (or frame) that used a window.open( ) method to generate the current window. This property allows subwindows to assemble references to objects, variables, and functions in the originating window. To access document objects in the creating window, a reference can begin with opener and work its way through the regular document object hierarchy from there, as shown in the left side of the following example statement. The relationship between the opening window and the opened window is not strictly parent-child. The term "parent" has other connotations in scripted window and frame references. IE's dialog windows (the showModalDialog( ) and showModelessDialog( ) windows) do not support this property. Values between the main and dialog windows must be passed at creation time and via the dialog window's returnValue property upon closing.