context: 	GetLastChild : function( node, childNames )	{		// If childNames is a string, transform it in a Array.		if ( typeof ( childNames ) == 'string' )			childNames = [ childNames ] ;				var eChild = node.lastChild ;		while( eChild )		{			if ( eChild.nodeType == 1 && ( !childNames || eChild.tagName.Equals( childNames ) ) )				return eChild ;						eChild = eChild.previousSibling ;		} 				return null ;	},
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