Getting XML Data for levels from server

Ok So here is what i am trying to do. I have made a simple level creator and i have it so i can save the data for the level to a xml file and then load it from a xml to be edited again. My question is since it is not possible for all the xml file to just be downloaded if i am making this for the webplayer, how do i go about getting the xml information to the program. i do not know a lot about network programming, but even if someone can just post a tutorial or something i can probably figure it out. i am not sure if i need to build another simple program to talk to the game and pass it the info about the created levels or what. Any help i can get would be great. Also if i need to clarify anything just ask.