can u explain the following code
<p>Here is my code.. but i am unable to understand this code. plz help me</p>

<pre><code>$('.maxlength')

    .after("&lt;span&gt;&lt;/span&gt;")

    .next()

    .hide()

    .end()

    .keypress(function(e) {

        var current = $(this).val().length;

        if (current &gt;= 130) {

            if (e.which != 0 &amp;&amp; e.which != 8) {

                e.preventDefault();

            }

        }

        $(this).next().show().text(130 - current);

    });
</code></pre>
