/* Function to remove a video, and replace one in the same div. */
function nextID(currentID, nextID){
	
	new Effect.Fade(currentID, { duration: 0 });
	new Effect.Appear(nextID);
	
	return false;
	
}

/* Function to highlight an element. */
function elementOpacity(ID, fromOpacity, toOpacity){
	
	new Effect.Opacity(ID, { from: fromOpacity, to: toOpacity, duration: 1 });
	
	return false;
}