Вот код IE9
<form id="site-search" data-url="/en-US/search">
<p onclick="var t = this; while(t = t.nextSibling) alert(t); return false">
<input name="q" id="q" role="search" type="text" placeholder="Search MDN" value="">
<noscript>
<button type="submit">Search</button>
</noscript>
</p>
<input name="sitesearch" type="hidden" value="developer.mozilla.org">
<div id="site-search-gg"></div>
</form> <a id="tabzilla" href="http://www.mozilla.org/">mozilla</a>
<!-- top toolbar -->
<section id="nav-toolbar">
<div>
<div class="wrap">
<!-- right floated navigation -->
<nav id="tool-menus" role="navigation">
<ul id="tools">
<li class="menu"> <a class="toggle" href="#page-tools">This page</a>
<ul class="sub-menu" id="page-tools">
<li class="page-print"> <a title="Print page" onclick="return window.print();" href="#">Print this page</a>
</li>
<li><a href="/en-US/docs/new?parent=41044">New sub-page</a>
</li>
<li><a href="/en-US/docs/new?clone=41044">Clone this page</a>
</li>
</ul>
</li>
<li class="menu"> <a class="toggle" href="#">Languages</a>
<ul id="translations">
<li><a href="/en-US/docs/DOM/treeWalker.filter$locales">Add translation</a>
</li>
</ul>
</li>
</ul>
</nav>
<!-- left crumb navigation -->
<nav class="crumbs" role="navigation">
<ol>
<li class="crumb"><a href="/en-US/docs/DOM">Document Object Model (DOM)</a>
</li>
<li class="crumb">treeWalker.filter</li>
</ol>
</nav>
</div>
</div>
</section>
<div>***</div>
Другая проблема, что IE8 не закрывает SECTION тег, а так же не может получить содержимое noscript