unique.js from this discussion //http://codereview.stackexchange.com/questions/57581/how-can-i-quickly-find-unique-list-items

unique.js

function uniques(array) {
    var result = [], val, ridx;
    outer:
    for (var i = 0, length = array.length; i < length; i++) {
        val = array[i];
        ridx = result.length;
        while (ridx--) {
          if (val === result[ridx]) continue outer;
        }
        result.push(val);
    }
    return result;
}