'language="javascript"' is deprecated.

In the script tag, 'language="javascript"' is deprecated,
'type="text/javascript"' is valid, but optional.
Leave the latter, remove the former or replace it with
the latter.

Signed-off-by: Thomas Hochstein <thh@inter.net>
Merge pull request #39 from th-h/thh-htmlvalidation

'language="javascript"' is deprecated.