1. why<BR>2. if you mean what I think you mean, you can't<BR>3. 'start' a download? no, the user does that, not you. though you CAN force the 'save as' dialog instead of just diaplaying a file in the browser. is this what you mean?
You'd have to use some other protocol. Which means you have to install some sort of download program on the user's machine. Which makes it tougher to sell people on the service.<BR><BR>Catch-22.<BR><BR>
Otherwise, every site you clicked on would start filling your hard drive with junk files, just hoping that someday you'd be silly enough to actually use one of the virus-laden things.<BR><BR>Or better! Suppose they could force you to download a file and they shoved a new version of EXPLORER.EXE down your throat. So next time you *thought* you were opening a browser window you'd actually be wiping out your hard drive.<BR><BR>