title: Stopping a popup from opening twice
body: <p>Hi my problem is as follows: I have a popup window opening on pageload with a music player.
  The problem is that the popup window opens every time i load the page. Also users are supposed to be able to choose if they want the music player to open the next time they visit the page. (Its on the homepage)</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;
  testpage music player
  &lt;/title&gt;
  &lt;SCRIPT LANGUAGE="JavaScript"&gt;
  function popUp(URL) {
  day = new Date();
  id = day.getTime();
  eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=200,height=250,top=690,left=390');");
  }
  &lt;/script&gt;
  &lt;/head&gt;
  &lt;BODY onLoad="javascript:popUp('http://www.ccc-clan.com/board/popupex.html')"&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>