function showIndexAD(num){
  switch (num){
      case 1:
        window.location = 'http://www.sapphiretech.com/presentation/product/?psn=000101&pid=295';
        break;
      case 2:
        window.location = 'http://www.sapphiretech.com/presentation/product/?cid=&psn=0001&gid=3&sgid=918';
        break;
      case 3:
        window.location = 'http://www.sapphiretech.com/presentation/HD5800/HD5800_index.aspx?cid=1';
        break;
      case 4:
       window.location = 'http://www.sapphiretech.com/presentation/product/?psn=000101&pid=293';
        break;
      case 5:
        window.location = 'http://www.sapphiretech.com/presentation/member/member_index.aspx';
        break;
    default:
      break;
  }
}