"Insert into post" – Inserting form data from a pop-up window into the main window

I have a button labeled "Upload image", when you click the button it opens a pop-up window with a small image uploader in there. When you upload an image, I want it to say "Insert into post开发者_Python百科" in the pop-up window and when you click that it then inserts the filename of the image into the post.

I've already got a way to get the filename, all I need to know is how to SEND the data from the pop-up box form and put it into the main window.

Any ideas?

Thank you in advance

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You can use the opener property of the pop-up window to find an hidden input in the main window:

window.opener.document.getElementById('id_of_hidden').value = 'something';

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When you open a pop-up window, the

window.opener

property will point to the parent window. You will be able to proceed from there.

MDC documentation on window.opener

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window.opener.document.data = data_from_popup;