reveal.js

		getIndices: function() {
			return { 
				h: indexh, 
				v: indexv 
			};
		},

		// Returns the previous slide element, may be null
		getPreviousSlide: function() {
			return previousSlide
		},

		// Returns the current slide element
		getCurrentSlide: function() {
			return currentSlide
		},

		// Forward event binding to the reveal DOM element
		addEventListener: function( type, listener, useCapture ) {
			( dom.wrapper || document.querySelector( '.reveal' ) ).addEventListener( type, listener, useCapture );
		},
		removeEventListener: function( type, listener, useCapture ) {
			( dom.wrapper || document.querySelector( '.reveal' ) ).removeEventListener( type, listener, useCapture );
		}
	};
	
})();