function addEvent(obj, eventType, afunction, isCapture) {
  // W3C DOM
  if (obj.addEventListener) {
     obj.addEventListener(eventType, afunction, isCapture);
     return true;
  }
  // Internet Explorer
  else if (obj.attachEvent) {
     return obj.attachEvent("on"+eventType, afunction);
  }
  else return false;
}

function DoLayout()
{
//  addEvent(document.getElementById('togglePlayer'), 'click', TogglePlayer, false);

  var divMain = document.getElementById('divMain');
  divMain.style.top        = (document.documentElement.clientHeight/3 - divMain.clientHeight) + 'px';
  divMain.style.left       = (document.documentElement.clientWidth/2 - divMain.clientWidth/2) + 'px';
  divMain.style.visibility = 'visible';
}

function TogglePlayer()
{
  var divPlayer = document.getElementById('divPlayer');
  if (divPlayer.style.visibility == 'hidden')
  {
    divPlayer.style.visibility = 'visible';
  }
  else
  {
    divPlayer.style.visibility = 'hidden';
  }
}

addEvent(window, 'load', DoLayout, false);
addEvent(window, 'resize', DoLayout, false);