<html>
<head>
<title>Test page</title>
</head>
<body>
<div style="text-align: center;margin:10em;">
<h3 id="the_string"> Nothing to echo </h3>
</div>
<script>
var h = document.getElementById('the_string');
h.innerText = decodeURIComponent(document.location.search.substring(1));
</script>
</body>
</html>