[ubuntu] No Wireless (New to Ubuntu)

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http://ubuntuforums.org – Hello, sorry if this is in the wrong place, but I am new to Ubuntu, and I need help. I just installed Ubuntu 12.04 on my Dell Inspiron 6400. Everything went fine with the installation, but there is no wireless. When I hover over the wireless logo, it says "Wireless Networks device not ready (firmware missing)". I don't know how to install the missing firmware if I don't have access to the web. Anyways, any help is appreciated. I look forward to using Ubuntu as I am fed up with Windows. Thanks in advance avanboekel11 (Hardware)