var dom = true;
if (!document.getElementById) dom = false;
if (!document.getElementById && document.all) {document.getElementById = document.all; dom = true;}

function isEmpty(e) {
  return ((e == null) || (e.length == 0));
}

function isEmail(mail) {
  re = /^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,7}$/;
  return mail.search(re) == 0;
}

/* JW FLV PLAYER VIDEO TRACKING */
/* list of video files played */
var videoPlayed = new Array();

/* called by JW FLV PLAYER after SWF is loaded */
function playerReady(obj) {
	addListeners(obj.id);
}

/* listener triggered on state change */
function playerPlay(obj) {
  if (obj.newstate=='PLAYING') {
    if (videoPlayed.indexOf(obj.id)==-1) {
      //alert('playerPlay: '+obj.id);
      videoPlayed.push(obj.id);
      if (pageTracker!=null) {
        pageTracker._trackEvent('Videos', 'Play', obj.id);
      }
      else {
        //alert('playerPlay: tracker not found!');
      }
    }
  }
}

/* attempts to add listener for a video, if player is not ready, waits for 100 milliseconds befor trying again */
function addListeners(playerID) {
  var player;
  player = document.getElementById(playerID);
  if (!player) {
    setTimeout("addListeners('"+playerID+"')",100);
  }
  else {
    player.addModelListener("STATE", "playerPlay");
  }
}