- if ((album.json&&album.json.content[photo.getID()]&&album.json.content[photo.getID()].nextPhoto==="")||lychee.viewMode) $("a#next").hide();
- if ((album.json&&album.json.content[photo.getID()]&&album.json.content[photo.getID()].previousPhoto==="")||lychee.viewMode) $("a#previous").hide();
+ if ((album.json&&album.json.content&&album.json.content[photo.getID()]&&album.json.content[photo.getID()].nextPhoto==="")||lychee.viewMode) $("a#next").hide();
+ if ((album.json&&album.json.content&&album.json.content[photo.getID()]&&album.json.content[photo.getID()].previousPhoto==="")||lychee.viewMode) $("a#previous").hide();