function showmovie(str) {
  var winl = (screen.width-640)/2;
  var wint = (screen.height-480)/2;
  movie = window.open(str,'video','channelmode=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=640,height=480,top='+wint+',left='+winl);
}

function showlarge(str) {
  var winl = (screen.width-800)/2;
  var wint = (screen.height-450)/2;
  movie = window.open(str,'video','channelmode=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=800,height=450,top='+wint+',left='+winl);
}

function showmap(str) {
  var winl = (screen.width-800)/2;
  var wint = (screen.height-600)/2;
  movie = window.open(str,'video','channelmode=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,top='+wint+',left='+winl);
}

function showinfo(str) {
  var winl = (screen.width-800)/2;
  var wint = (screen.height-600)/2;
  movie = window.open(str,'video','channelmode=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=800,height=600,top='+wint+',left='+winl);
}