diff --git a/web2d/src/test/javascript/render/mootools.js b/web2d/src/test/javascript/render/mootools.js
index 38369cea..3a3803ba 100644
--- a/web2d/src/test/javascript/render/mootools.js
+++ b/web2d/src/test/javascript/render/mootools.js
@@ -1031,11 +1031,9 @@ window.onDomReady = function(fn) {
 };
 window.extend({getWidth:function() {
     if (this.webkit419)return this.innerWidth;
-    if (this.opera)return document.body.clientWidth;
     return document.documentElement.clientWidth;
 },getHeight:function() {
     if (this.webkit419)return this.innerHeight;
-    if (this.opera)return document.body.clientHeight;
     return document.documentElement.clientHeight;
 },getScrollWidth:function() {
     if (this.ie)return Math.max(document.documentElement.offsetWidth, document.documentElement.scrollWidth);
@@ -2168,4 +2166,4 @@ var Accordion = Fx.Elements.extend({options:{onActive:Class.empty,onBackground:C
 },showThisHideOpen:function(index) {
     return this.display(index);
 }});
-Fx.Accordion = Accordion;
\ No newline at end of file
+Fx.Accordion = Accordion;
diff --git a/wise-webapp/src/main/webapp/js/mootools.js b/wise-webapp/src/main/webapp/js/mootools.js
index f8bfa0be..909f4c92 100644
--- a/wise-webapp/src/main/webapp/js/mootools.js
+++ b/wise-webapp/src/main/webapp/js/mootools.js
@@ -3709,7 +3709,6 @@ window.extend({
 
     getWidth: function() {
         if (this.webkit419) return this.innerWidth;
-        if (this.opera) return document.body.clientWidth;
         return document.documentElement.clientWidth;
     },
 
@@ -3720,7 +3719,6 @@ window.extend({
 
     getHeight: function() {
         if (this.webkit419) return this.innerHeight;
-        if (this.opera) return document.body.clientHeight;
         return document.documentElement.clientHeight;
     },
 
@@ -7170,4 +7168,4 @@ var Accordion = Fx.Elements.extend({
 
 });
 
-Fx.Accordion = Accordion;
\ No newline at end of file
+Fx.Accordion = Accordion;