adding unique class for new div
<p>I want add a unique class for each new div after input, how is it in my code?</p>

<p>Add class for this: <code>&lt;div class="thing"&gt;&lt;/div&gt;</code></p>

<p><strong>DEMO:</strong> <a href="http://jsfiddle.net/wAwyR/2/" rel="nofollow">http://jsfiddle.net/wAwyR/2/</a> => please in here(field) typing a number for adding new input.</p>

<pre><code>function unique() {
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for (var i = 0; i &lt; 5; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
}

$('input').live("keyup", function () {
    $('.lee').empty();
    var $val = $(this).val();
    for (var i = 0; i &lt; $val; i++) {
        $('.lee').append('&lt;input type="text" name="hi" class=""&gt;div class="thing"&gt;&lt;/div&gt;');
        $('input[hi]').next('div').attr('class', unique())
    }
});
</code></pre>
