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<!-- This Source Code Form is subject to the terms of the Mozilla Public
- License, v. 2.0. If a copy of the MPL was not distributed with this
- file, You can obtain one at -->
<!DOCTYPE html>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript">
function show() {
var results = /\?topic=(.+)$/.exec(window.document.location);
var topic = decodeURIComponent(results[1].replace(/\+/g, " "));
var node = document.getElementById("topic");
node.textContent = topic;
<body onload="show()">
<div id="topic"></div>