Q:

How to get px height of the element with CSS height auto MooTools?

Is there any way to get actual element height ?
 getSize().y
returns 0 since element has property height auto?
even if you declare image inline property to auto you get 0 back?
Thank you!

A:

It sounds like you had a different issue, but to make this future-relevant, the mechanisms in MooTools for this are (for an element with the id x:
$('x').getSize().y

or
$('x').getCoordinates().height

Either of which will return an integer (no units) of the pixel height. So a 100 pixel tall element would return 100 for either of these.
You could also use the non-MooTools specific getComputedStyle method:
$('x').getComputedStyle('height')

Which returns the element height with the unit. So a 100 pixel tall element would return 100px.

