IS It STREET LEGAL HELP!!!?

Im wondering if this... http://www.amazon.com/Schwinn-SW-5007CD-RD-500S-Electric-Scooter/dp/B000MSDKN4/ref=pd_bbs_8/002-5451965-8653620?ie=UTF8&s=sporting-goods&qid=1194838785&sr=8-8 ... Electric scooter is street legal. Please write or copy/paste your sources or how you found out so we have complete proof. THanks . we live in wisconsin if that helps your knowledge