function ShowPlayWindow(urlstr) 
{
      if (urlstr == "wmp")
      {
      	w=window.open("http://www.functiont.info/music_w.html",'BGM','width=200,height=250,scrollbars=1');
      }
      else if (urlstr == "normal")
      {
      	w=window.open("http://www.functiont.info/music.html",'BGM','width=200,height=250,scrollbars=1');
      }
      else
      	w=window.open(urlstr,'BGM','width=200,height=250,scrollbars=1');
}