title: How to play audio uninterrupted while navigating pages on a website
body: <p>On some websites it is possible to start playing audio and move to the other links on this website without stopping the audio (it continues playing while you are navigating). But when you refresh the page or move to another website, it stops. How do they do that? Basically if you go to the other page on the website using the a href tag the music will stop.</p>
  
  <p>If they are using Ajax, won't the ajax slow down the website in this case? And how do they make the URL change then? Is this technique referred to as a 'single page website'?</p>