Javascript call to prototype js file doesn't work - pg. 116

[MatthewJenkins]

Here is probably just another example of something that worked fine when the book was published, but now with Cake version 1.2 has broken.

This code in my layouts/default.ctp does nothing:

$javascript->link(array('prototype'));

view source gives me nothing in that spot in the html head.

Entering it manually works fine:
        <script manual type="text/javascript" src="/js/prototype.js"></script>

But I'd rather know the correct way to do it for the future.
Anyone know what's changed or how I should format that javascript helper call?

(Yes, javascript has been added to my helpers. No error is produced with above call.)

[MatthewJenkins]

And... I solved my own problem. So daft sometimes.

For those of you at my extreme beginner level, you can solve this by adding an "echo" to the beginning, and a ".js" to the end.

(duh.)