function openYouTube(which) {
  var leff = (screen.width - 425) / 2;
  var topp = (screen.height - 350) / 2;
  window.open('http://windorphins.ebay.com/special/video_head_'+which+'.html','watchVideo','left='+leff+',top='+topp+',width=425,height=350,scrollbars=0,location=0')
};
function openVid(which) {
  var leff = (screen.width - 428) / 2;
  var topp = (screen.height - 320) / 2;
  window.open('http://windorphins.ebay.com/special/video_trial_'+which+'.html','watchVid','left='+leff+',top='+topp+',width=428,height=320,scrollbars=0,location=0')
};