Invoke a Parent Window Function from Another Window in JavaScript
Sometimes, you need to call a JavaScript function that's in a parent window from a child window. For example, suppose you wanted to update a field in the parent window when a user enters or selects some value in a child window.
You can achieve this using the window DOM object's window.opener property, which holds a reference to the parent window object model. After you have the parent window reference, you can access any functions, variables, or controls in the parent window.
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