Need guidance on designing mobile websites [closed]

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http://stackoverflow.com – Ive recently gotten into web design and development. Ive been designing small nice looking websites for local companies around my home town. Recently I designed a website for a transmission company. They love their new site but recently contacted me again asking if i also do mobile versions. I design using teh 960 grid system so most of the websites i do end up looking nice on mobile platforms anyway. But if i wanted to create a fully functioning mobile site that automatically detected when it was a mobile device, how would i go about doing that. I would love any good links or tutorials (HowTos)