<script type="text/javascript" charset="utf-8">  
  $(document).ready(function(){
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // The row numbers that you want preceded by a blank row
    var rowNumbers = [1, 7, 10, 13];
 
    // Create a clean clone of a row
    var rowClone = $('tr.subquestions-list:eq(0)', thisQuestion).clone();
    $(rowClone).attr('id', '').removeClass('array1 array2 ').addClass('inserted-row');
    $('td, th', rowClone).attr('class', '').html('');
 
    // Insert the blank rows
    var rowNumbers = rowNumbers.reverse();
    $(rowNumbers).each(function(i, val) {
      $('tr.subquestions-list:eq('+(val-1)+')', thisQuestion).before($(rowClone).clone());
    });
 
    // Fix up the row classes
    var rowClass = 1;
    $('tr.subquestions-list', thisQuestion).each(function(i) {
      if($(this).hasClass('inserted-row')) {
        rowClass = 1
      }
      else {
        rowClass++;
        $(this).removeClass('array1 array2 ')
        if(rowClass % 2 == 0) {
          $(this).addClass('array2');
        }
        else {
          $(this).addClass('array1');
        }
      }
    });
  });
</script>

.inserted-row th,
.inserted-row td {
  background: #999;
  padding: 8px !important;
}

<script type="text/javascript" charset="utf-8">  
  $(document).ready(function(){
    // Identify this question
    var thisQuestion = $('#question{QID}');
 
    // The row numbers that you want preceded by a blank row
    var rowNumbers = [1, 7, 10, 13];
 
    // The row labels
    var rowLabels = ['Label 1', 'label 2', 'Label 3', 'Label 4'];
 
    // Create a clean clone of a row
    var rowClone = $('tr.subquestions-list:eq(0)', thisQuestion).clone();
    $(rowClone).attr('id', '').removeClass('array1 array2 ').addClass('inserted-row');
    $('td, th', rowClone).attr('class', '').html('');
 
    // Insert the blank rows
    var rowNumbers = rowNumbers.reverse();
    $(rowNumbers).each(function(i, val) {
      $('tr.subquestions-list:eq('+(val-1)+')', thisQuestion).before($(rowClone).clone());
    });
 
    // Insert the row labels
    $(rowLabels).each(function(i, val) {
      $('tr.inserted-row th:eq('+i+')', thisQuestion).text(val);
    });
 
    // Fix up the row classes
    var rowClass = 1;
    $('tr.subquestions-list', thisQuestion).each(function(i) {
      if($(this).hasClass('inserted-row')) {
        rowClass = 1
      }
      else {
        rowClass++;
        $(this).removeClass('array1 array2 ')
        if(rowClass % 2 == 0) {
          $(this).addClass('array2');
        }
        else {
          $(this).addClass('array1');
        }
      }
    });
  });
</script>

.inserted-row th,
.inserted-row td {
  background: #999;
  padding: 8px !important;
}
 
.inserted-row th {
  color: #FFF;
  font-weight: bold;
}