slugify.js

String.prototype.slugify = function() {
  return this.toLowerCase().trim()
             .replace(/[áàãâä]/g,    "a")
             .replace(/[éèẽêë]/g,    "e")
             .replace(/[íìĩîï]/g,    "i")
             .replace(/[óòõôö]/g,    "o")
             .replace(/[úùũûü]/g,    "u")
             .replace(/ç/g,          "c")
             .replace(/(\ |_)+/,     " ")
             .replace(/(^-+|-+$)/,   "")
             .replace(/[^a-z0-9]+/g, "-");
}