explain this code
<p>I need to understand what does the code do<br>
this page is on my blog and I have not created it</p>

<pre><code>var u = location.href, h = u.substr(u.indexOf('#') + 1).split('&amp;'), t, r;
try {
  t = h[0] === '..' ? parent.parent : parent.frames[h[0]];
  r = t.gadgets.rpc.receive;
} catch (e) {
}
r &amp;&amp; r(h);
</code></pre>

<p>location of the page is<br>
<a href="http://roadtoheavenisnothere.blogspot.com/rpc_relay.html" rel="nofollow">http://roadtoheavenisnothere.blogspot.com/rpc_relay.html</a></p>
