INPUT type=file value=????

I realize that this isn't a PHP issue, but I'd like find out they why's/wherefore's of this: The W3C HTM 4x spec(s) say that when using the file type on a form input element, "User agents may use the value of the value attribute as the initial file name." I can't get Mozilla, Netscape, nor IE to do this. Here's my code: <FORM ENCTYPE="multipart/form-data" ACTION=<?=$PHP_SELF?> METHOD="POST"> Attachment #1: <INPUT NAME="s_attachment" TYPE="file" VALUE="d:\\test.txt"> <INPUT TYPE="submit" VALUE="Send File"> </FORM> The wrapped lines do have a space in front of them. Is this an oversight, did I miss something in the docs, or have I done something really stupid? -Al