get (alphabet) word at point

gistfile1.js

function wordAtPoint(text, point) {
  var wordRx = /[a-zA-Z_]+/, separatorRx = /(\s)/,
      words, word, i, len, n;

  words = text.split(separatorRx);

  for (i = n = 0, len = words.length; i < len; i++) {
    if (point < (n += words[i].length)) {
      if (wordRx.test(words[i])) {
        word = words[i];
      }
      break;
    }
  }

  return word;
}