ocument.createElement( 'iframe' );
					upcomingSlide.setAttribute( 'width', 640 );
					upcomingSlide.setAttribute( 'height', 512 );
					upcomingSlide.setAttribute( 'src', upcomingURL );
					document.querySelector( '#upcoming-slide' ).appendChild( upcomingSlide );

				}

				/**
				 * Setup the notes UI.
				 */
				function setupNotes() {

					notes = document.querySelector( '.speaker-controls-notes' );
					notesValue = document.querySelector( '.speaker-controls-notes .value' );

				}

				/**
				