Is this spider poisonous? picture included?

i found this of google images it looked like the spider in the image but it was smaller it didn't have any dots on its back either a href="http://www.google.com/imgres?q=small+white+spider&hl=en&client=firefox-a&rls=org.mozilla:en-US:official&gbv=2&biw=1022&bih=437&tbm=isch&tbnid=08wT0X3sGqGmUM:&imgrefurl=http://kimberlyshaw.typepad.com/my_weblog/from-the-garden/&docid=LB8s485T3LUTGM&w=350&h=219&ei=8kIuTsCfJsO3sQKUup1j&zoom=1&iact=hc&vpx=629&vpy=122&dur=939&hovh=175&hovw=280&tx=122&ty=135&page=1&tbnh=72&tbnw=115&start=0&ndsp=12&ved=1t:429,r:10,s:0" rel="nofollow"http://www.google.com/imgres?q=small+whi…/a