As Martin said in the comments ID's are unique selectors, so for apply style for td tag in script, you can use some thing like this:

<script>
  let td = document.getElementsByTagName('td');
  for (i = 0; i < td.length; i++) {
  td[i].style.padding = "20px";
  }
</script>

or change Id to class: strHtml += '<td class="curr-cell">'

and use document.getElementsByClassName('curr-cell') in above code.