encyclo - 2:46 am on Dec 20, 2005 (gmt 0)

As you have seen, only Opera supports this. The HTML4 specifications [w3.org] suggest:

User agents may use the value of the value attribute as the initial file name.

But in reality it is pretty unworkable: there are two distinct problems, the first being security (hence the confirmation step in Opera, else confidential information could unwittingly be uploaded). The second problem is platform differences: I run Linux, so there is no a:\ path - you can't reliably second-guess a file's location.

You might want to check out Jukka Korpela's (as always) very comprehensive guide:

[cs.tut.fi...]