JavaScript Support Test?

[JAB Creations]

Does anyone know of any JavaScript support tests? I'm thinking along the lines of this only instead of testing CSS selectors I'm thinking about JavaScript in it's own applicable way...
[css3.info...]

- John

[RonPK]

<script type="text/javascript">alert('It works!');</script>

;)

More serious: what would be the purpose of the test?

[Bernard Marx]

I happened across this just now: [w3.org...]

Not a Javascript support test, but a DOM test..