function showIndexAD(num){
  switch (num){
      case 1:
          window.location = 'http://www.sapphiretech.com/presentation/product/?psn=0001&pid=1088';
        break;
      case 2:
         window.location = 'http://www.sapphiretech.com/presentation/product/?leg=&psn=000101&pid=1080';
        break;
      case 3:
          window.location = 'http://www.sapphiretech.com/presentation/product/?leg=&psn=000101&pid=1094'; 
        break;
      case 4:
        window.location = 'http://www.sapphiretech.com/presentation/product/?leg=&psn=0001&pid=1034';
        break;
      case 5:
        window.location = 'http://www.sapphiretech.com/presentation/product/?cid=&leg=&psn=0001&gid=3&sgid=1041';
        break;
    default:
      break;
  }
}