WebClass And Ftp

HI everybody.
I am building a site where users can book(?) rooms for conferences and such.
And when the administrators are adding rooms to the database (sql 7.0) i am storing all their informations I gather from a form they fill in.
My question is how to construct an easy to way to upload images to the webserver, which is running ftp server as well, and store the images with a filename I choose, like "roomidnumber".jpg.
If they type or browse for the image from within the browser and then just hit the OK button I want this to happen automatically ?
Anyone got a solution for this ?