Makes text a "lot" better

emphasize.js

var sign = "The best hotdogs in town.";

String.prototype.emphasize = function(options) {
  options = options || {
    minWordLength: 3
  };
  
  var wordRegex = new RegExp('(\\w{' + options.minWordLength + ',})', 'g');
  var words = this.match(wordRegex);
  
  if(!words) {
    return this;
  }
  
  var selected = words[Math.floor(Math.random()*words.length)];
  var newText = this.replace(selected, '"' + selected + '"');

  return newText;
};

alert(sign.emphasize());