my simple animate function not working
<p>my html is:</p>

<pre><code>&lt;html&gt;
    &lt;body&gt;
        &lt;button id="widthPlus"&gt;increase &lt;/button&gt;
        &lt;div id="bod"&gt; hai &lt;/div&gt;
        &lt;img id="tree" src="http://www.rangde.org/newsletter/nov11/images/real_tree.png" width="350"/&gt;
    &lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>my script is:</p>

<pre><code>$(document).ready(function() { 
    $("#widthPlus").click(function(){ 
        var currentwidth = $('#tree').attr('width'); 
        var currentwidthNum = parseFloat(currentwidth, 350); 
        var newwidth = currentwidthNum+5; 
        $('#tree').animate({'width', newwidth}, 5000); 
        return false;
    });
}); 
</code></pre>

<p>i am trying to increase(5px) the image width when click a button <a href="http://jsfiddle.net/sureshpattu/XjaD5/2/" rel="nofollow">my jsfiddle is here</a></p>
