Index: ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/imagefilemanager/action/ShowImageAction.java
===================================================================
diff -u -r24786 -r25725
--- ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/imagefilemanager/action/ShowImageAction.java	(.../ShowImageAction.java)	(revision 24786)
+++ ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/imagefilemanager/action/ShowImageAction.java	(.../ShowImageAction.java)	(revision 25725)
@@ -95,7 +95,7 @@
 
 		Long objectId = getObjectId(parameters);
 		
-		if (StringUtils.isNumeric(page) && DatabaseUtil.isPoIdValid(objectId)) {
+		if (StringUtils.isNotBlank(page) && StringUtils.isNumeric(page) && DatabaseUtil.isPoIdValid(objectId)) {
 			int index = Integer.parseInt(page);
 			int count = imageFileManager.getImagesCount(objectId, imageType);
 			if (index > 0 && index <= count) {