End the jQuery function when its recalled
<p>i build a jQuery function here <a href="http://jsfiddle.net/JuW3B/3/" rel="nofollow">http://jsfiddle.net/JuW3B/3/</a> </p>

<p>i want this function stop animating and completes it's animation when it's recalled by another action before the first animation completed,</p>

<p>so, when it's called like this</p>

<pre><code>$('.a').pushUp();
</code></pre>

<p>and then another action which call to this function before the first function completing it's animation</p>

<pre><code>$('.b').pushUp();
</code></pre>

<p>i want to forcedly ended the first function before the second function begin</p>
