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<script>
A disallowed block-level tag
</script>

<blockquote>
An allowed block-level tag
</blockquote>

<a href="http://google.com">An allowed span-level tag</a>

<a href="javascript:blah">A disallowed span-level tag</a>

<blockquote>
<a href="http://google.com">An allowed span-level tag</a>
</blockquote>

<blockquote>
<a href="javascript:blah">A disallowed span-level tag</a>
</blockquote>

post
