function swapVideo(vid) {
   var url = vid.href;
   var video = url.split("/");
   var ext = video[video.length - 1].split(".");

   ext[ext.length - 1] = 'flv';
    
   var iframe = document.getElementById('video');
   var path = '/videos/viewer.php?video=' + ext.join(".");
   iframe.src = path;

   vid.className = 'selected';
}