var vidnum;
function getElementRefById(id) {
	var e = (document.getElementById) ? document.getElementById(id) : (document.all) ? document.all[id] : (document.layers) ? document.layers[id] : null;
	if (e) e.css = (e.style)? e.style: e;
	return e;
}
function showVideo(id1,id2) {
  var sv1 = getElementRefById(id1);
  var sv2 = getElementRefById(id2);
  if (sv1 && sv1.css) {
    sv1.css.visibility = "visible";
    sv1.css.display = "block";
  }
  if (sv2 && sv2.css) {
    sv2.src = getVideoUrl(sv2.src) + "?autoplay=true";
  }
}
function hideVideo(id1,id2) {
  var hv1 = getElementRefById(id1);
  var hv2 = getElementRefById(id2);
  if (hv1 && hv1.css) {
    hv1.css.visibility = "hidden";
    hv1.css.display = "none";
  }
  if (hv2 && hv2.css) {
    hv2.src = getVideoUrl(hv2.src) + "?autoplay=false";
  }
}
function getVideoUrl(url){
  var u = url.split('?');
  if (u.length > 1) {
    return u[0];
  }
  return url;
}