Ha. yeah I know nothing about Asynchronous JavaScript and XML, but I live in Ajax. In the 1970s Ajax was probably a town of 20K. It's 100K now and the radio station is long gone.
So, is it just a matter of copying the live system to a sub-folder and then moving it back when changed and tested? I have been reading about Serverpress and Instant wordpress, but it's not clear if it is a simple upload to the live site.
