Function getRandomImages
Returns a randomly selected image from the gallery. (May be NULL if none exists)
boolean | 
		$daily = false | 
		set to true and the picture changes only once a day. | 
			object
		 | 
		object | 
Returns a randomly selected image from the gallery. (May be NULL if none exists)
boolean | 
		$daily = false | 
		set to true and the picture changes only once a day. | 
			object
		 | 
		object |