How do i connect my xbox wirelessly to the net?

I recently got a xbox 360 from my friend. it didnt come with any instruction manual or anything. i wanna know how to connect to the net wireless. do i need an adaptor? i already have my wii connected wireless. thanks for the help.How do i connect my xbox wirelessly to the net?
there are alternatives to the Microsoft one:



http://www.amazon.com/wireless-gaming-ad鈥?/a>



http://gear.ign.com/articles/440/440246p鈥?/a>How do i connect my xbox wirelessly to the net?
You will need this



http://www.xbox.com/en-US/hardware/x/xbo鈥?/a>
Yes, you need to buy Microsoft's Xbox 360 Wireless Adapter. The Xbox doesn't have built in wi-fi.





Unfortunately, you can only buy Microsoft's, which is around a hundred bucks, this is because you can't install drivers onto your 360.
U need to buy the Microsoft xbox 360 Wireless adapter which u can get at gamestop for about $70 used that if u can find one used now a days or new for about $100 or u can find them also on ebay pretty cheap.