I now understand that pop-ups are not generally acceptable and open a new tab and/or invocation of the browser which isn't really want I want anyway.
I don't know what the correct term is for such a window but what I want to happen is that a small e.g. 300x250 window displays dynamically over the top of the existing webpage showing a map associated with the reference (clickable or mouse-over) based on provided latitude/longitude DMS parameters.
I'd prefer Google but another map provider would do.
I have used inline Google maps before but can't seem to find any reference to this type of display (whatever the correct term for them is).
Sorry wbport, I can't find anything in the API documentation and examples. Everything starts (or appears to start) with the premise that you have a map and want to do something with it. I have text (and location parameters) and want to display a map based on that (sounds like a pretty common thing to do but then what do I know.
DanInMA, spot on (I think)? Now I know it is a "modalbox" that I want (I think). When you know what to search for, it makes life a lot simpler.