Playing with Typehead

<script src="//cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.10.5/typeahead.jquery.js"></script>

<style type="text/css">
/* https://github.com/bassjobsen/typeahead.js-bootstrap-css */
span.twitter-typeahead .tt-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    float: left;
    min-width: 160px;
    padding: 5px 0;
    margin: 2px 0 0;
    list-style: none;
    font-size: 14px;
    text-align: left;
    background-color: #ffffff;
    border: 1px solid #cccccc;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    -webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
    background-clip: padding-box;
}
span.twitter-typeahead .tt-suggestion > p {
    display: block;
    padding: 3px 20px;
    clear: both;
    font-weight: normal;
    line-height: 1.42857143;
    color: #333333;
    white-space: nowrap;
}
span.twitter-typeahead .tt-suggestion > p:hover,
span.twitter-typeahead .tt-suggestion > p:focus {
    color: #ffffff;
    text-decoration: none;
    outline: 0;
    background-color: #428bca;
}
span.twitter-typeahead .tt-suggestion.tt-cursor {
    color: #ffffff;
    background-color: #428bca;
}
span.twitter-typeahead {
    width: 100%;
}
.input-group span.twitter-typeahead {
    display: block !important;
}
.input-group span.twitter-typeahead .tt-dropdown-menu {
    top: 32px !important;
}
.input-group.input-group-lg span.twitter-typeahead .tt-dropdown-menu {
    top: 44px !important;
}
.input-group.input-group-sm span.twitter-typeahead .tt-dropdown-menu {
    top: 28px !important;
}
</style>

<form id="typeheadForm" method="post" class="form-horizontal">
    <div class="form-group">
        <label class="col-xs-3 control-label">US state</label>
        <div class="col-xs-5">
            <input type="text" class="form-control" name="state" />
        </div>
    </div>

    <div class="form-group">
        <div class="col-xs-5 col-xs-offset-3">
            <button type="submit" class="btn btn-default">Submit</button>
        </div>
    </div>
</form>

<script>
$(document).ready(function() {
    var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
        'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
        'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
        'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
        'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
        'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
        'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
        'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
        'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
    ];
    var substringMatcher = function(strs) {
        return function findMatches(q, cb) {
            var matches, substrRegex;
            /* an array that will be populated with substring matches */
            matches = [];
            /* regex used to determine if a string contains the substring `q` */
            substrRegex = new RegExp(q, 'i');
            /**
             * iterate through the pool of strings and for any string that
             * contains the substring `q`, add it to the `matches` array
             */
            $.each(strs, function(i, str) {
                if (substrRegex.test(str)) {
                    /**
                     * the typeahead jQuery plugin expects suggestions to a
                     * JavaScript object, refer to typeahead docs for more info
                     */
                    matches.push({ value: str });
                }
            });
            cb(matches);
        };
    };

    $('#typeheadForm')
        .find('input[name="state"]')
            .typeahead({
                hint: true,
                highlight: true,
                minLength: 1
            }, {
                name: 'states',
                displayKey: 'value',
                source: substringMatcher(states)
            })
            .on('typeahead:selected', function(e, suggestion, dataSetName) {
                /* Revalidate the state field */
                $('#typeheadForm').formValidation('revalidateField', 'state');
            })
            .on('typeahead:closed', function(e) {
                /* Revalidate the state field */
                $('#typeheadForm').formValidation('revalidateField', 'state');
            });

    $('#typeheadForm')
        .formValidation({
            framework: 'bootstrap',
            icon: {
                valid: 'glyphicon glyphicon-ok',
                invalid: 'glyphicon glyphicon-remove',
                validating: 'glyphicon glyphicon-refresh'
            },
            fields: {
                state: {
                    validators: {
                        notEmpty: {
                            message: 'The state is required'
                        }
                    }
                }
            }
        });
});
</script>