File Upload using <input> tag

I wish to perform file upload.
I wrote name="userfile" type=file accept="text/txt" in the input tag
in my htm file.
When i clicked the browse button showed by the browser i saw the filters Allfiles *.*, Html "*.htm", Image "*.jpg"
If i wish to filter only the files of text with extension txt what i have to do?

Check out this link... http://www.asp.net/community/control...px?category=50... you can download examples of various ASP.NET AJAX uploaders with configure specs in the download package... see which one works best for you.

Hope this helps

Larry Darrah
MS Architect Evangelist