case 4: screen.state="xemngaytotxauhoangdao";break;
case 5: screen.state="xemtheothang";break;
case 6: screen.state="aboutdialog";break;
case 4: screen.state="xemngaytotxauhoangdao";break;
case 5: screen.state="xemtheothang";break;
case 6: screen.state="aboutdialog";break;