2 <p>PASS if no crash and no assertion failure.
</p>
3 <iframe id=
"dc"></iframe>
7 bs
.animate([{"backgroundClip":"content-box"}, {"backgroundClip":"border-box"}], 2000);
8 try {bs
.appendChild(document
.querySelector("e2").cloneNode(true));}catch(e
){}
9 dc
.contentDocument
.body
.appendChild(ak
);