function showIndexAD(num){
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    case 1:
      window.location = 'http://www.sapphiretech.com/presentation/media/?psn=0004&articleID=2868';
      break;
    case 2:
      window.location = 'http://www.sapphiretech.com/presentation/media/?psn=0004&articleID=2279';
      break;
    case 3:
      window.location = 'http://www.sapphiretech.com/presentation/media/?psn=0004&articleID=2427';
      break;
    case 4:
      window.location = 'http://www.sapphiretech.com/presentation/media/?psn=0004&articleID=2340';
      break;
    case 5:
      window.location = 'http://www.sapphiretech.com/presentation/product/technology.aspx?psn=000801&lid=14';
      break;
    default:
    break;
  }
}