Thanks everyone for the responses, (including a couple of private ones) particularly those pointing me to useful articles etc.
I'm now enlightened. ;) Much appreciated. Cheers, David. ______________________________________________________________________ css-discuss [css-d@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/