如何在关闭的弹出窗口中提供（在IE和Firefox中）二进制文件下载？

I need a cross-browser solution to the following use case: The user clicks an "export" button on one of our pages, which opens a popup with a form. On submitting the form, the user should receive a binary file download (a CSV file, for example), and the popup should close without changing the visible content of the parent window. I need a cross-browser solution to the followin