4 <script type=
"text/javascript">
8 document
.removeEventListener("DOMSubtreeModified", uu
);
9 document
.execCommand("undo", false, null);
14 document
.execCommand("selectAll", false, null);
15 document
.execCommand("strikethrough", false, null);
16 document
.addEventListener("DOMSubtreeModified", uu
);
17 document
.execCommand("undo", false, null);
23 <body contenteditable=
"true" onload=
"boom();"><div></div></body>