[jQuery] Re: why not get value using $('#wrapper').attr('offsetHeight') in firefox?

[Sebastián V. Würtz]

nightelf escribió:
in firefox
$('#wrapper').attr('offsetHeight') == undefined
but
document.getElementById('Wrapper').offsetHeight
is ok
  
the offsetHeight is an attrib? i think its a property, im not so sure 
use this
$('#wrapper').css('height');