:             <input type="text" name="country" id="autocomplete-ajax" style=" background: transparent;" required placeholder="Type country name and select from list"/>

var countries = {
"0": "South Africa",
"1": "Australia",
"2": "Brazil",
"3": "United States",
"4": "Zimbabwe"

/*jslint  browser: true, white: true, plusplus: true */
/*global $, countries */

$(function () {


var countriesArray = $.map(countries, function (value, key) { return { value: value, data: key }; });

// Setup jQuery ajax mock:
$.mockjax({
    url: '*',
    responseTime: 2000,
    response: function (settings) {
        var query = settings.data.query,
            queryLowerCase = query.toLowerCase(),
            re = new RegExp('\b' + $.Autocomplete.utils.escapeRegExChars(queryLowerCase), 'gi'),
            suggestions = $.grep(countriesArray, function (country) {
                 // return country.value.toLowerCase().indexOf(queryLowerCase) === 0;
                return re.test(country.value);
            }),
            response = {
                query: query,
                suggestions: suggestions
            };

        this.responseText = JSON.stringify(response);
    }
});

// Initialize ajax autocomplete:
$('#autocomplete-ajax').autocomplete({
    // serviceUrl: '/autosuggest/service/url',
    lookup: countriesArray,
    lookupFilter: function(suggestion, originalQuery, queryLowerCase) {
        var re = new RegExp('\b' + $.Autocomplete.utils.escapeRegExChars(queryLowerCase), 'gi');
        return re.test(suggestion.value);
    },
    onHint: function (hint) {
        $('#autocomplete-ajax-x').val(hint);
    },

});

});