HTML Panel Number Input filed

I want to make sure that the user input is always a number in that field. No letters. Chrome does that when I make the input type a "number". But that same thing doesn't work in the panel in illustrator. Here's the code in index file

<ul>
          <li>
              <label for="columns">Columns</label>
              <input type="number" id="columns" value="10">
          </li>
          <li>
              <label for="gutter">Gutter</label>
              <input type="number" id="gutter" value="15">
          </li>
          <li>
              <label for="moveFromH">From:</label>
              <input type="number" id="moveFromH" value="15">
          </li>
          <li>
              <label for="moveToH">To:</label>
              <input type="number" id="moveToH" value="15">
          </li>
</ul>