title: Adobe edge - get scroll position value
body: <p>I'm trying to code something in Adobe edge.</p>
  
  <p>Currently I can get the mouse position and control the timeline with the x value.</p>
  
  <pre><code>mousemove:
  this.onMove(posX, posY);
  
  compositionready:
  this.onMove=function(posX, posY){
  timelinecontrol = Number(posX)*80;
  console.log(timelinecontrol);
  sym.stop(timelinecontrol);
  }
  </code></pre>
  
  <p>How can I get the scroll distance from the top of the page and use it instead of posX?</p>