title: Checking all radiobuttons without Jquery
body: <p>i want to check the first element of multiple radiobutton groups.</p>
  
  <p>I'm using Firebug, which is why i do not want, yes i know there is firequery, but there must be a way like they did it in the old days :)</p>
  
  <p>Any help yould be great, thx in advance.</p>