i wanna try to use ajax to async something from the mysql database.. i have read many tutorial/book/article recently and there are many things that I don't clearly understand.
it looks like json is a good pick to do stuffs like loading things from a database. however, the examples i read didn't mention anything about database. And i don't really get what callWebService() and callBack() do.
any hint or good tutorial I can read to teach myself?