The Anonymous user has the access already. It can enter in the website, and can check the library, access the jquery file; the only problem is the loading process. I tryed to put an external link from google code which any anonymous user can read, but it’s still not working. I think it is not a permission problem, but with sharepoint server, or windows server. I’ll try some other ways and I’ll try to get the solution, maybe, Thanks Alex for the help.