b/S cat uncle

Very complex, to the client file to the server, and then from the server to FTP ...    It's a swollen design.    At least you have to read the client's files to the server's memory, because B/S controller in the S-end, not on the C/s to achieve, you have to achieve B-end of the transmission, s-side only record the FTP storage address on the line if the same time uploaded files, you can't pass, upload more files, your server to burst It must have been with ActiveX before.
Now you can use Flash or websocket

b/S cat uncle