Centrino unable to lookup domains

[neutralizer]

My laptop's wireless craps out often in which it can't look up the ip address of the urls I type. Like if I wanted to go to google.com, it would time out trying to look up, but if I input the ip address, it works. However, if I reconnect and connect, it regains the ability to look up, but over time, it loses the ability except for the pages that are already open. At first, I thought it was a problem with the router, but it doesn't happen with any other laptop with wireless in the house, so... has anyone else experienced this problem or knows how to fix it?