What software I can use to block advertisements on web pages including "Yahoo Answers'" matrimony Ads?

Some times there are numbers of questions and answers that I share with my family but I had for them to see matrimonial ads even on Yahoo Answers!!! What software can I do to block those Ads?

Thanks in advance, give your free opinion, I have cable internet.
Update: I started using FireFox ABP and by accident blocked jimobasa's display image. lol

Thanks for your answers!!!
Update 2: Whoever mentioned FireFox Ad-Block, Thank you for your answers. Rest of you just got two points for no reason.
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