jQuery $(document).ready() not firing

Using jQuery 1.4.2 from Google hosted Code.

Is there a reason why the following javascript does not fire all 3 document.ready functions when the document is ready?

The first $(document).ready() function, which renders headers, and the second, which gives a 'Foo' alert box triggered, but subsequent ones in new <script> blocks aren't triggered,

<script type="text/javascript">
    $(document).ready(function () {
        Cufon.replace('h1'); // Works without a selector engine
        Cufon.replace('h2'); // Works without a selector engine
        Cufon.replace('h3'); // Works without a selector engine
        Cufon.now();
    });
    $(document).ready(function () { alert("Number Foo"); });
</script>

// html tags

<script type="text/javascript">
    $(document).ready(function () { alert("Number One"); });
    $(document).ready(function () { alert("Number Two"); });
</script>

These are in seperate web parts, hosted on the same page in Sharepoint2010