Edit in JSFiddle

$(document).ready(function() {
    $('#result_link').click(function() {
        try {
            val = $('#input_value').val();
            eval('$(\'#result_typeof\').html(typeof ' + val + ')');
            eval('$(\'#result_getclassname\').html($.typeOf(' + val + '))');
        } catch (e) {
            $('#result_typeof,#result_getclassname').html('invalid input!!');
        }
        return false;
    });
    $('#input_value').keyup(function(event) {
        if (event.which == 13) {
            $('#result_link').click();
        }
    });
});

<div>
    Try inputting js object like: 'aya hirano' or new Date
</div>
<div>
    <label for="input_value">input value to determine</label>
    <input type="text" name="input_value" id="input_value" value="['aya','hirano']" />
</div>

<div>
    <a id="result_link" href="#">click here</a>
    or press enter
</div>
<hr />
<div>
    typeof result:
    <span id="result_typeof" class="result"></span>
</div>
<div>
    $.typeOf() result:
    <span id="result_getclassname" class="result"></span>
</div>