var floater = null;
   function videopopup56( url ) {
   var a="toolbar=no,location=no,directories=no,menubar=no,width=430,height=300,resizable=yes,scrollbars=no";
   if (navigator.appName.indexOf("Microsoft")>=0) {
      a+=",left=50,top=50";}
      else {
      a+=",screenX=50,screenY=50";}
      if( floater != null )
         if( floater.closed == false )
         floater.close();
         floater=window.open("http://www.pbs.org/perfectillusions/video_players/"+url+".html","VIA" + url,a);
         floater.creator = self;}

   function videopopup220( url ) {
   var a="toolbar=no,location=no,directories=no,menubar=no,width=582,height=390,resizable=yes,scrollbars=no";
   if (navigator.appName.indexOf("Microsoft")>=0) {
   a+=",left=50,top=50";}
      else {
      a+=",screenX=50,screenY=50";}
      if( floater != null )
         if( floater.closed == false )
         floater.close();
         floater=window.open("http://www.pbs.org/perfectillusions/video_players/"+url+".html","VIA" + url,a);
         floater.creator = self;}