HTML input type = file in Adobe AIR does not render file browser

So the good old HTML file tag only loads the view button (no associated text input) when rendered in an HTML-based Adobe AIR application. Nothing happens when the browse button is pressed. I would expect a popup so that I can select the file. I've seen examples of people using Javascript to call the AIR runtime to get a file and download it, but I was wondering if anyone knows a complete HTML / Javascript way to do this with AIR.

thanks