Olu,
your reference to "popup windows" is somewhat ambiguous.
there are "real" popup windows, in other words new browser instances, and these open in a new tab (full screen) in Safari on iOs. They can also be blocked with popup-blockers and so on.
then there are "simulated" popups - such as what NetTalk uses for popup forms and lookups. These are really just some clever HTML and JavaScript _on the original page_ that get unhidden at the appropriate time. They are not "popups" in the "true" sense of the word, but they simulate a windows-like environment that has multiple "windows".
Which one were you referring to?
cheers
Bruce