title: In JavaScript, how can I get all radio buttons in the page with a given name?
body: <p>Like the title says, what's the best way in <a href="http://en.wikipedia.org/wiki/JavaScript" rel="noreferrer">JavaScript</a> to get all radio buttons on a page with a given name?  Ultimately I will use this to determine which specific radio button is selected, so another way to phrase the question:</p>
  
  <p>Given a string variable in JavaScript, how can I tell which exact radio button input element (if any) with that string as it's name is currently selected?</p>
  
  <p>I'm <em>not</em> using jQuery.  If you want to provide a jQuery answer, go ahead.  Someone else might find it useful.  But it won't help me and I won't upvote it.</p>