Adding N-amount of FileUpload Items

Hello All,


I know I have read some problems/solutions for doing this.. but, I can't remember 'where'?
Basically, I want a BUTTON that says 'ADD FILE', when that is pressed I want a new FileUpload1 item to be shown. ... when the 'ADD FILE' is pressed again, I want a second FileUpload2 item to be shown.. etc... 


but, I want the filename to be 'remembered' - for FileUpload1, etc.. (FileUpload N-1).. and I know on a postback that the filename is lost (for security reasons).... so, I am hoping for a solution similar to gmail, etc... where you can have multiple attachments and then the attachment is turned into a text string.. but, the file is still uploaded/attached..


any 'best methods'...?


thanks...
...