auto add html table role parameters for semantic code.

table.js

function AddTableARIA() {
  try {
    var allTables = document.querySelectorAll('table');
    for (var i = 0; i < allTables.length; i++) {
      allTables[i].setAttribute('role','table');
    }
    var allCaptions = document.querySelectorAll('caption');
    for (var i = 0; i < allCaptions.length; i++) {
      allCaptions[i].setAttribute('role','caption');
    }
    var allRowGroups = document.querySelectorAll('thead, tbody, tfoot');
    for (var i = 0; i < allRowGroups.length; i++) {
      allRowGroups[i].setAttribute('role','rowgroup');
    }
    var allRows = document.querySelectorAll('tr');
    for (var i = 0; i < allRows.length; i++) {
      allRows[i].setAttribute('role','row');
    }
    var allCells = document.querySelectorAll('td');
    for (var i = 0; i < allCells.length; i++) {
      allCells[i].setAttribute('role','cell');
    }
    var allHeaders = document.querySelectorAll('th');
    for (var i = 0; i < allHeaders.length; i++) {
      allHeaders[i].setAttribute('role','columnheader');
    }
    // this accounts for scoped row headers
    var allRowHeaders = document.querySelectorAll('th[scope=row]');
    for (var i = 0; i < allRowHeaders.length; i++) {
      allRowHeaders[i].setAttribute('role','rowheader');
    }
  } catch (e) {
    console.log("AddTableARIA(): " + e);
  }
}

AddTableARIA();