utton>
        <div class="message-box">
          <p id="error-message" class="color: red;"></p>
          <p id="disclaimer" class="opacity: 0.6;"></p>
        </div>
      </div>
    </div>
  </div>
  <div id="preview">
    <table class="spreadsheet">
      <colgroup>
        <col style="width:20%"/>
        <col style="width:20%"/>
        <col style="width:20%"/>
        <col style="width:20%"/>
        <col style="width:20%"/>
      </colgroup>
      <thead>
        <tr>
          <th><span></span></t