pop-up windows

[nospam]

two queries:

if I have multiple windows open, and I start a page loading
on one, and flick to another
to read text in that window, the first window comes to the
front (changes the "focus") when the
page has loaded. This irritates the f**k out of me. Is there
any way to disable this "feature"?

also, when I visit pages hosted by tripod, geocities,etc,
little rectangular windows pop
up with adverts in them. Is there any way to disable these
pop up windows?

cheers.

gavin.