Prototype - DOM Traversal with up()

I have the following structure:

<form>
    <div class="content">
        ...
    </div>
    <div class="action">
        <p>Select <a class="select_all" href="?select=1" title="Select All">All</a></p>
    </div>
</form>

I am using Prototype's up() to traverse the DOM in order to find the <form> element in respect to the a.select_all. However the following doesn'开发者_如何学Got work:

select_link.up('form'); // returns undefined

Yet, this does.

select_link.up().up().up(); // returns HTMLFormElement

Clearly this is an ancestor of a.select_all. The API Docs state Element.up() supports a CSSRule. What am I missing here?

It works fine by me: http://jsfiddle.net/f9HdB/

You can simply use Function#bind instead of Function#bindAsEventListener.

Do you used a code like this:

var select_link = $$('.select_all').first()

to get the DOM-Object of the link?