Make friendly url and remove Polish national characters

slugify.js

function slugify(text)
{
  var fromChar = [/ą/ig, /ę/ig, /ó/ig, /ś/ig, /ł/ig, /ż/ig, /ź/ig, /ć/ig, /ń/ig];
  var toChar = ['a', 'e', 'o', 's', 'l', 'z', 'z', 'c', 'n'];
  for ( var i in fromChar )
    text = text.replace(fromChar[i], toChar[i]);
  return text.toString().toLowerCase()
    .replace(/\s+/g, '-')           // Replace spaces with -
    .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
    .replace(/\-\-+/g, '-')         // Replace multiple - with single -
    .replace(/^-+/, '')             // Trim - from start of text
    .replace(/-+$/, '');            // Trim - from end of text
}