The HTTP_REFERER basically reloads the previous page and does not take me back to the point on the page that I was on. So it is close but not exactly what I want. In Firebird there is something called a JavaScript Console. This is telling me that history has no properties. So it looks like the problem is with the Firebird and/or my configuration of the browser. Later, Mike
Apart from the fact that that seems to work here (using epiphany rather than firebird, admittedly, but they both use the same renderer so should be identical), the only thing that springs to mind is that most javascript snippets have javascript: in front of them e.g. onClick="javascript:history.go(-1);return true;" . TBH though, you might do better to use the HTTP_REFERER header to set the return page explicitly as it'll then work even in browsers that have javascript disabled.
Gareth