diff --git a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/student.js b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/student.js
index 167c8c0e..e0af1625 100644
--- a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/student.js	
+++ b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/student.js	
@@ -30,10 +30,6 @@ function student(text) {
 		
 	}
 
-	console.log("german: " + deWordCount);
-	console.log("english: " + enWordCount);
-	console.log("french: " + frWordCount);
-	
 	// return specific language
 	if (deWordCount >= enWordCount && deWordCount >= frWordCount) {
 		return lang.german;
diff --git a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/utility.js b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/utility.js
index fb1e73a0..673053eb 100644
--- a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/utility.js	
+++ b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddon/resources/jid0-gn3ivo79cgfs9k4p3lxdo7tpfa4-keaddon-lib/utility.js	
@@ -10,9 +10,9 @@ function tokenize(text) {
 }
 
 
-function arrayContains(a, obj) {
-    for (var i = 0; i < a.length; i++) {
-        if (a[i] === obj) {
+function arrayContains(array, element) {
+    for (var i = 0; i < array.length; i++) {
+        if (array[i] === element) {
             return true;
         }
     }
diff --git a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddonWithHeuristic.xpi b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddonWithHeuristic.xpi
index 041c9e25..06ea59fa 100644
Binary files a/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddonWithHeuristic.xpi and b/ss2013/1_Web Mining/Uebungen/1_Uebung/keaddonWithHeuristic.xpi differ