diff --git a/vendor/built_in_modules/gallery/app/assets/javascripts/galleryAPI_frontend.js.erb b/vendor/built_in_modules/gallery/app/assets/javascripts/galleryAPI_frontend.js.erb
index 440ca6f90..c5ecf0c0b 100644
--- a/vendor/built_in_modules/gallery/app/assets/javascripts/galleryAPI_frontend.js.erb
+++ b/vendor/built_in_modules/gallery/app/assets/javascripts/galleryAPI_frontend.js.erb
@@ -15,17 +15,19 @@ var galleryAPI = function(){
 		if(g.loadArea == "theater"){
 			if(rcom.getInternetExplorerVersion()!=-1){
 				var photo_id = window.location.hash.replace("#","");
-				var params = rcom.getUrlVars();
-				var url = window.location.href.split("?")[0];
-				params["id"] = photo_id;
-				for(i=0;i<params.length;i++){
-    				if(i == 0)
-    					url+="?"+params[i]+"="+params[params[i]];
-    				else
-    					url+="&"+params[i]+"="+params[params[i]];
+				if(photo_id){
+					var params = rcom.getUrlVars();
+					var url = window.location.href.split("?")[0];
+					params["id"] = photo_id;
+					for(i=0;i<params.length;i++){
+	    				if(i == 0)
+	    					url+="?"+params[i]+"="+params[params[i]];
+	    				else
+	    					url+="&"+params[i]+"="+params[params[i]];
 
-				}
+					}
 				window.location.href = url;
+				}
 			}
 		}
 	}