jQuery animate change content width

jQuery animate change content width

HTML

<a class="handle">button</a>
<div id="scribblar"></div>

CSS

a {
padding:10px;
cursor:pointer;
background:#000;
color:#fff;}
#scribblar{
background:#f60;
width:43px;
height:80px;}

JavaScript

$(document).ready(function($) {  
    $('.handle').toggle(function(){
        $('#scribblar').animate({'width': '100px'}, 400);
    }, function(){
        $('#scribblar').animate({'width': '43px'},400);
    });
});