Title Case

titlecase.js

  var smallWords = /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;

  return input.replace(/[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g, function(match, index, title){
  if (index > 0 && index + match.length !== title.length &&
    match.search(smallWords) > -1 && title.charAt(index - 2) !== ":" &&
    (title.charAt(index + match.length) !== '-' || title.charAt(index - 1) === '-') &&
    title.charAt(index - 1).search(/[^\s-]/) < 0) {
    return match.toLowerCase();
  }

  if (match.substr(1).search(/[A-Z]|\../) > -1) {
    return match;
  }

  return match.charAt(0).toUpperCase() + match.substr(1);