<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
   <head>
      <title>A test</title>
      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
   </head>
   <body>
      <a href="javascript:alert('\x48ello');">Say hello</a><br />
   </body>
</html>