Sizzle.selectors.filters.hidden = function(elem){
var width = elem.offsetWidth, height = elem.offsetHeight,
- force = /^tr$/i.test( elem.tagName ); // ticket #4512
+ force = /^tr$/i.test( elem.nodeName ); // ticket #4512
return ( width === 0 && height === 0 && !force ) ?
true :
( width !== 0 && height !== 0 && !force ) ?