cannot stream file to desktop from pop-up window

[dmcdivitt]

I changed an edit screen to appear as a pop-up window. Previously everything was being done in the same window with too much navigation back and forth. Unfortunately I cannot stream a file to the desktop if invoked from a pop-up window. If I invoke the page directly by entering a URL address, it will stream a file to the desktop, but if rendered as a pop-up, when an attempt is made to stream a file, nothing happens.

 

Streaming a file to the desktop is done as follows:

    header("Content-disposition: attachment; filename=$filename");
    header("Content-type: document/pdf");
    readfile($filename);
    return;

 

This causes an open/save/cancel dialog to appear in the browser. Help would be appreciated. The browser used is IE. I can't try Firefox, since IE must be used for the ActiveX functionality, so I don't know if other browsers have a pop-up window limitation. Anyway, I have to make it work in IE. Thanks