Unless you want your parent window to be reloaded, I don't see a problem here.
Anyway, how are you going to change a static text?
You could eather change it with javascript dynamicly, and does not reload your window, or change it using a server side technology - JSP,ASP and so on - choose any of those.
If you want to go with JavaScript - you will use layes (div's, spans - whatever) - if you don't want to go with IE only. At this case
you should have some function, that will rewrite layer for a given row ID with given data - something like
setRow(rowID, dataArray) - and you could call it using from your popup.
I actually prefer server side way - but as you mention, it requires a server.