how to call a phone number through javascript without using tag?

You can simply add an onclick handler to your <tr> tag, then call window.open("https://stackoverflow.com/questions/17897213/tel:+1800229933");.

Like so:

<table>
  <tr onclick="window.open('tel:900300400');">
    <td>Phone: 900 300 400</td>
  </tr>
</table>