On a PHP-based web site, I want to send users a download package after they have filled out a short form. The site-initiated download should be similar to sites like download.com, which say "your download will begin in a moment."
A couple of possible approaches I know about, and browser compatibility (based on a quick test):
1) Do a window.open pointing to the new file.
- FireFox 3 blocks this.
- IE6 blocks this.
- IE7 blocks this.
2) Create an iframe pointing to the new file.
- FireFox 3 seems to think this is OK. (Maybe it's because I already accepted it once?)
- IE6 blocks this.
- IE7 blocks this.
How can I do this so that at least these three browsers will not object?
Bonus: is there a method that doesn't require browser-conditional statements?
(I believe that download.com employs both methods conditionally, but I can't get either one to work.)
Responses and Clarifications:
Q: "Why not point the current window to the file?"
A: That might work, but in this particular case, I want to show them some other content while their download starts - for example, "would you like to donate to this project?"
UPDATE: I have abandoned this approach. See my answer below for reasons.
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