code: function ( obj, arg ) {
  		if ( regex.selector_is.test( arg ) ) {
  			utility.id( obj );
  			return ( element.find( obj.parentNode, obj.nodeName.toLowerCase() + arg ).filter( function ( i ) {
  				return ( i.id === obj.id );
  			}).length === 1 );
  		}
  		else {
  			return new RegExp( arg, "i" ).test( obj.nodeName );
  		}
  	}
docs: Determines if Element is equal to arg, supports nodeNames & CSS2+ selectors
  
  @method is
  @param  {Mixed}   obj Element
  @param  {String}  arg Property to query
  @return {Boolean}     True if a match