i understand, so it needs to be in the souce code of the page.

but i do remember like somebody else recalled in the other post that skype in the past made a plugin for firefox to highlight all the numbers on a page as phone numbers.

well, at that time i found the thing a bit annoying and ditched it, but in this case it would not bother me

and by the way how do you copy and paste a number from a webpage??