Normalizer

index.js

function normalize(str) {
    var from = "1234567890ÃÀÁÄÂÈÉËÊÌÍÏÎÒÓÖÔÙÚÜÛãà áäâèéëêìíïîòóöôùúüûÑñÇç '/&().!",
        to = "izeasgtogoAAAAAEEEEIIIIOOOOUUUUaaaaaeeeeiiiioooouuuunncc_____",
        mapping = {};

    for (var i = 0, j = from.length; i < j; i++) {
        mapping[from.charAt(i)] = to.charAt(i);
    }

    var ret = [];
    for (var i = 0, j = str.length; i < j; i++) {
        var c = str.charAt(i);
        if (mapping.hasOwnProperty(str.charAt(i))) {
            ret.push(mapping[c]);
        } else {
            ret.push(c);
        }
    }
    return ret.join('').toLowerCase();
}