// Array to specify which day number each of the frames 'belongs' to:
	days = new Array(0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,2,2,3,3,4,4);

	// Width in pixels of the spacers for each frame indicator:
	//indWidth = new Array(7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,26,26,26,26,29); 

	// List of timesteps. Used to build image filename
	// NB. Hours that fall on 'midnight' for 'night-time' images have 1 subtracted from them so they show 
	// up as night-time on the day before. eg. if T+72 = 00:00 Thurs, it should be labelled 'Night-time Weds'
	timesteps = new Array('00','03','06','09','12','15','18','21','24','27','30','33','36','39','42','47','60','71','84','95','108','119')