title: Add double quotes to string which is stored in variable
body: <p>I have variable which i am getting from DB string url, But the url does not have quotes to url i need to add the quotes to it below is my code.</p>
  
  <pre><code> var audioUrl
   url is having string like http://xxxxx/xxx/xx-xx-123.m4a without double quotes
   audioUrl= (data.url)
  
   i need convert data.url value to "http://xxxxx/xxx/xx-xx-123.m4a"
  
         Circle Jplayer
         var audio="http://xxxxx/xxx/xx-xx-123.m4a"
         var myOtherOne = new CirclePlayer("#jquery_jplayer_2",
          {
              m4a: audio,
          }
  </code></pre>