Autocomplete JS

$('#autocomplete').autocomplete({
    source: function(req, res) {
    var loadFromCache = autocomplete_from_cache(req.term);
    // Return cache results, if there are
    if (loadFromCache) {
        return res(loadFromCache);
    }

        $.get('/autocomplete/company/' + req.term.replace(/ /g, '+'), function(r) {
        autocomplete_add_cache(req.term, r);
        return res(r);
        }, 'json');
    },
    minLength: 2,
    select: function (e, ui) {
        $(e.target).val(ui.item.name);
        return false;
    }
}).autocomplete('instance')._renderItem = function (ul, item) {
    return $('<li>')
        .append('<a>' + item.name + '</a>')
        .appendTo(ul);
};

function autocomplete_add_cache(term, results) {
    var expiry = new Date();
    expiry.setMonth(expiry.getMonth() + 1);
    expiry = expiry.getTime();

    localStorage.setItem('autocomplete-company-' + encodeURI(term.toLowerCase()), JSON.stringify({ expiry: expiry, results: results }));
}

function autocomplete_from_cache(term) {
    // Check for local storage
    if (typeof localStorage !== 'undefined') {
        try {
            localStorage.setItem('feature_test', 'yes');
            if (localStorage.getItem('feature_test') === 'yes') {
                localStorage.removeItem('feature_test');
            } else {
                return false;
            }
        } catch(e) {
            return false;
        }
    } else {
        return false;
    }

    // Check if item exists
    if (localStorage.getItem('autocomplete-' + type + '-' + encodeURI(term.toLowerCase())) === null)
        return false;

    var autocomplete = JSON.parse(localStorage.getItem('autocomplete-company-' + encodeURI(term.toLowerCase())));
    // Check if is expired
    if (autocomplete.expiry < new Date().getTime()) {
        return false;
    }

    return autocomplete.results;
}