Generate a table comparing the differences between the escape, encodeURI, and encodeURIComponent functions

gistfile1.js

function createRow(c, tr) {
  var td = document.createElement('td');
  td.align = 'center';
  td.innerHTML = c;
  if (c[0] !== '%') {
    td.style.backgroundColor = '#ffc';
  }
  tr.appendChild(td);
}

function createTable(tableId) {
  for (var i = 0; i < 128; i++) {
    var c = String.fromCharCode(i);
    var c1 = escape(c);
    var c2 = encodeURI(c);
    var c3 = encodeURIComponent(c);

    if ((c1 === c2) && (c2 === c3)) {
      continue;
    }

    var tr = document.createElement('tr');
    var td = document.createElement('td');
    td.align = 'center';
    td.innerHTML = c;
    tr.appendChild(td);

    createRow(c1, tr);
    createRow(c2, tr);
    createRow(c3, tr);

    document.getElementById(tableId).appendChild(tr);
  }
}

createTable('results');