// for RHA site
// Photo changing effect for project gallery
 function switch_photos(photo_id) {
	if (current_photo != photo_id) {
	  Effect.Fade('photo'+current_photo, { transition: Effect.Transitions.sinoidal, duration: 0.750 });
	  Effect.Appear('photo'+photo_id, { transition: Effect.Transitions.sinoidal, duration: 0.750 });
	  current_photo = photo_id;
	}
 }