"Pages" in a browser is non-existant. Its why people have issues with on-screen vs. printed output not matching. Reference: http://www.w3c.org
If I guess what the issue is, a "page" could be another browser opening up like you read about in the HIGHJACKING or HIJACKED posts at http://reviews.cnet.com/5204-6132-0.html?forumID=32&start=0
How do I remove the 2 pages someone added to my.msn.com in IE 6 SP1?