Element Extensions
Here is the documentation for Element.js.
The Element object gets a LOT of love in MooTools. Most of the functions in the Element object are pretty self explanatory. Element.getTag does what you'd think it would.
Because Element receives so much attention, it's got its own section in the code and it's broken up into four files:
mootorial/04-element.txt · Last modified: 2008/10/27 23:53