function next(cname){
  if ( cname != "" ){
    coursewin = window.open("", "course", "scrollbars=yes,resizable=yes,width=440,height=360");
    coursewin.focus();

    if ( cname == 'mikaeri' ) coursewin.location = "./mikaeri.html";
    if ( cname == 'maguna' ) coursewin.location = "./maguna.html";
    if ( cname == '1' ) coursewin.location = "./1.html";
    if ( cname == '2' ) coursewin.location = "./2.html";
    if ( cname == '3' ) coursewin.location = "./3.html";
    if ( cname == 'mitsu' ) coursewin.location = "./mitsu.html";
    if ( cname == 'red' ) coursewin.location = "./red.html";
    if ( cname == 'onigiri' ) coursewin.location = "./onigiri.html";
    if ( cname == 'ryu' ) coursewin.location = "./ryu.html";
    if ( cname == 'hashi' ) coursewin.location = "./hashi.html";
    if ( cname == 'deko' ) coursewin.location = "./deko.html";
    if ( cname == 'enzyu' ) coursewin.location = "./enzyu.html";
    if ( cname == 'meoto' ) coursewin.location = "./meoto.html";
    if ( cname == 'sawa' ) coursewin.location = "./sawa.html";
    if ( cname == 'takimi' ) coursewin.location = "./takimi.html";


  }
}