title: How to play a sound when first entering a webpage?
body: <p>How would I make an mp3 play on my html page but only the first time someone enters? So that if they came back to that same page a second time they wouldn't hear the sound a second time?</p>
  
  <p>EDIT: I know how to play sounds and everything I just need to find out the 'first time only' part of it.</p>