diff --git a/src/lab/exp2/evaluate.js b/src/lab/exp2/evaluate.js
index 2b1d20be7..a4f28cd59 100644
--- a/src/lab/exp2/evaluate.js
+++ b/src/lab/exp2/evaluate.js
@@ -3,34 +3,41 @@ function eval()
 	var form = document.forms["quiz"];
 
 	/* Initialise answers */
-	var a1 = "2"
+	var a1 = "2";
 	var a2 = "1";
 	var a3 = "3";
 	var a4 = "4";
 
 	/* Extract answers */
-	var q1, q2, q3, q4, length;
+	var q1, q2, q3, q4, length1;
 	
-	length = form["q1"].length;
-	for(i=0; i<length; i++)
-		if(form["q1"][i].checked)
+	length1 = form["q1"].length;
+	for(var i=0; i<length1; i++){
+		if(form["q1"][i].checked){
 			q1 = form["q1"][i].value;
-	
-	length = form["q2"].length;
-	for(i=0; i<length; i++)
-		if(form["q2"][i].checked)
-			q2 = form["q2"][i].value;
-	
-	length = form["q3"].length;
-	for(i=0; i<length; i++)
-		if(form["q3"][i].checked)
-			q3 = form["q3"][i].value;
+		}
+	}
 
-	length = form["q4"].length;
-	for(i=0; i<length; i++)
-		if(form["q4"][i].checked)
-			q2 = form["q4"][i].value;
+	length1 = form["q2"].length;
+	for(var j=0; j<length1; j++){
+		if(form["q2"][j].checked){
+			q2 = form["q2"][j].value;
+		}
+	}
 	
+	length1 = form["q3"].length;
+	for(var k=0; k<length1; k++){
+		if(form["q3"][k].checked){
+			q3 = form["q3"][k].value;
+		}
+	}
+
+	length1 = form["q4"].length;
+	for(var l=0; l<length1; l++){
+		if(form["q4"][l].checked){
+			q4 = form["q4"][l].value;
+		}
+	}
 	/* Evaluate answers */
 	var score = 0;
 	var result = "Correct answers: ";
@@ -60,8 +67,12 @@ function eval()
 	}
 
 	/* Show result */
+	if(score == 0){
+		var output= "Your score is 0 \n";
+	}
+	else
 	var output = "Your score is " + score + "\n";
 	output += result;
-	
+
 	alert(output);
 }