Some examples of embedded javascript that won't be let through when this
plugin is active:
-* <span style="background: url(javascript:window.location='http://example.org/')">test</span>
-* <span style="any: expression(window.location='http://example.org/')">test</span>
-* <span style="any: expression(window.location='http://example.org/')">test</span>
+* script tag test <script>window.location='http://example.org';</script>
+* <span style="background: url(javascript:window.location='http://example.org/')">CSS script test</span>
+* <span style="any: expression(window.location='http://example.org/')">entity-encoded CSS script test</span>
+* <span style="any: expression(window.location='http://example.org/')">entity-encoded CSS script test</span>