function convertToRegex(s) {
  res = s;
  res = res.replace(/(\b)[a-zA-Z]+(\b)/,  '\\1(\\w+)\\2');
  res = res.replace(/(\b)\d+(\b)/,        '\\1(\\d+)\\2');
  res = res.replace(/\s+/,                '\\s+');
  return res;
}

function convertS() {
  var s = document.getElementById("s").value;
  alert(s);
}