diff --git a/samples/utils/domevents/mousewheel/MouseWheel.tpl b/samples/utils/domevents/mousewheel/MouseWheel.tpl
index a2180ee..7257c55 100644
--- a/samples/utils/domevents/mousewheel/MouseWheel.tpl
+++ b/samples/utils/domevents/mousewheel/MouseWheel.tpl
@@ -4,9 +4,9 @@
 } }
 
   {macro main ( )}
-    <h3>This sample demonstrates the usage of onwheel</h3>
+    <h3>This sample demonstrates the usage of mosuewheel event callback</h3>
 
-	  Use the mouse wheel on the field below.
+	  Use the mouse scroll on the div below. One mouse scroll down is -120 and one mouse scroll up is +120.
       <div style="width:200px; height:200px; overflow:auto;" {on mousewheel {
         fn : this.onMouseScroll,
         scope : this
@@ -15,7 +15,8 @@
       </div>
       <br />
 
-      The last roll amount:
+      Below field shows the sum of scrolled value
+      <br/>
       <span style="background-color:#e0e0d0;">
         {@aria:NumberField {bind:{value:{to:"rolled",inside:data}}}/}
       </span>
diff --git a/samples/utils/domevents/mousewheel/MouseWheelScript.js b/samples/utils/domevents/mousewheel/MouseWheelScript.js
index 580672a..77c72ef 100644
--- a/samples/utils/domevents/mousewheel/MouseWheelScript.js
+++ b/samples/utils/domevents/mousewheel/MouseWheelScript.js
@@ -2,16 +2,11 @@ Aria.tplScriptDefinition({
     $classpath : "samples.utils.domevents.mousewheel.MouseWheelScript",
     $implements : ["aria.core.Browser", "aria.utils.Dom"],
     $prototype : {
-        onMouseScroll : function (event) {
-            var rolled = 0;
-            if ('wheelDelta' in event && !aria.core.Browser.isFirefox) {
-                rolled = event.wheelDelta;
-            } else { // Firefox
-                // The measurement units of the detail and wheelDelta properties are different.
-                rolled = -40 * event.detail;
-            }
-
-            this.$json.setValue(this.data, "rolled", rolled);
+        sumRolledVal : 0,
+        onMouseScroll : function (evt) {
+            this.sumRolledVal += (evt.detail) ? evt.detail * (-40) : evt.wheelDelta;
+            this.sumRolledVal = this.sumRolledVal > 0 ? 0 : this.sumRolledVal;
+            this.$json.setValue(this.data, "rolled", this.sumRolledVal);
         }
     }
 });