equals( jQuery.trim(elem.className), '', 'attr(removeClass)');
$elem.attr('css', {color:'red'});
equals( jQuery.trim(elem.className), '', 'attr(removeClass)');
$elem.attr('css', {color:'red'});
$elem.attr('height', 10);
equals( elem.style.height, '10px', 'attr(height)');
$elem.attr('height', 10);
equals( elem.style.height, '10px', 'attr(height)');