[renegade]

Sorry to hear your site was hacked Ray.
The problem with my site turned out AIUI to be a javascript snippet posted into the search form which ran itself when I accessed the admin screen which displays the recent searches. I think it's pretty harmless.
Purple, keeping a sequence of backups of your online site means you can use a file compare tool to pick up any changes, there's probably some techy automated solutions out there was well but most sites probably don't justify this level of redundancy.
Thanks again for your posts everyone.