function descriptionPreview(row, column, summaryrows) {
    for (y = 1; y < (summaryrows+1); y++) {
      for (x = 1; x < 4; x++) {
          if (y!=row || x!=column) document.getElementById('featuresLink' + (y) + '-' + (x)).className = "featuresColumnLink";
          if (y!=row || x!=column) document.getElementById('featuresDescription' + (y) + '-' + (x)).style.display = 'none';
      }
    }
    if (document.getElementById('featuresDescription' + (row) + '-' + (column)).style.display == 'none') {
        document.getElementById('featuresLink' + (row) + '-' + (column)).className = "featuresColumnLinkSelect";
        document.getElementById('featuresDescription' + (row) + '-' + (column)).style.display = 'block';
    } else {
        document.getElementById('featuresLink' + (row) + '-' + (column)).className = "featuresColumnLink";
        document.getElementById('featuresDescription' + (row) + '-' + (column)).style.display = 'none';
    }
}