*.html source file containing <script>...</script> not working?

Is a *.html source file containing supposed to work?

I added a foo.html containing

<body><script type="text/javascript" src="http://friendfeed.com/embed/widget/..."></script></body>

after normal build when I visit http://foobar.com/foo/ it gives me a normal page with head and footnote texts but empty body

Any ideas how this could/should work?