 <p>They devided <code>c</code> with <code>m*2</code> and assigned the value to <code>c</code>, then made sure <code>h</code> is not nothing:</p> <pre><code>c/=m*2;h!= </code></pre> <p>In other words: he did everything. The <em>ultimate</em> everything!</p> <hr> <p>Or maybe the cat sat on the keyboard and produced a random glob of characters. Cats are <em>very</em> good at that.</p> <hr> <p>I'm just kidding. ♥</p> <hr> <p><strong>Important bit:</strong> If anything, this "attack" has nothing to do with jQuery. Maybe they tried to make the web server error, somehow? Which they did, but I doubt it could do any damage. So, it's not really a threat.</p>