Acquired Opera AdBlock code

options/whitelist.js

-var section = document.createElement('h3');
-section.appendChild(document.createTextNode(translate.get('whitelist')));
-listsParent.appendChild(section);
+if(opera.version() >= 12.1) { //Whitelist is only supported above Opera 12.1
 
-var descript = document.createElement('p');
-descript.innerHTML = translate.get('whitelist_descript');
-listsParent.appendChild(descript);
+        var section = document.createElement('h3');
+        section.appendChild(document.createTextNode(translate.get('whitelist')));
+        listsParent.appendChild(section);
 
-var element = document.createElement('div');
-element.setAttribute('id', 'whitelist');
-element.setAttribute('class', 'section');
-listsParent.appendChild(element);
+        var descript = document.createElement('p');
+        descript.innerHTML = translate.get('whitelist_descript');
+        listsParent.appendChild(descript);
 
-var element = document.createElement('input');
-element.setAttribute('id', 'newWhitelist');
-element.setAttribute('type', 'text');
-element.setAttribute('placeholder', translate.get('whitelist_holder'));
-listsParent.appendChild(element);
+        var element = document.createElement('div');
+        element.setAttribute('id', 'whitelist');
+        element.setAttribute('class', 'section');
+        listsParent.appendChild(element);
 
-var elementParent = document.createElement('div');
-elementParent.setAttribute('class', 'button_parent');
-var element = document.createElement('button');
-element.setAttribute('onClick', 'whitelist.add()');
-element.appendChild(document.createTextNode(translate.get('save_apply')));
-elementParent.appendChild(element)
-listsParent.appendChild(elementParent);
+        var element = document.createElement('input');
+        element.setAttribute('id', 'newWhitelist');
+        element.setAttribute('type', 'text');
+        element.setAttribute('placeholder', translate.get('whitelist_holder'));
+        listsParent.appendChild(element);
 
-const whitelist = {
-        add: function() {
-                var rule = document.getElementById('newWhitelist').value;
-                if(rule != "") {
-                        lists.whitelist.add(rule, true);
-                        document.getElementById('newWhitelist').value = "";
+        var elementParent = document.createElement('div');
+        elementParent.setAttribute('class', 'button_parent');
+        var element = document.createElement('button');
+        element.setAttribute('onClick', 'whitelist.add()');
+        element.appendChild(document.createTextNode(translate.get('save_apply')));
+        elementParent.appendChild(element)
+        listsParent.appendChild(elementParent);
+
+        const whitelist = {
+                add: function() {
+                        var rule = document.getElementById('newWhitelist').value;
+                        if(rule != "") {
+                                lists.whitelist.add(rule, true);
+                                document.getElementById('newWhitelist').value = "";
+                                opera.extension.postMessage({request: 'ping', type: 'css'});
+                                this.display();
+                        }
+                },
+                remove: function(rule) {
+                        lists.whitelist.remove(rule, true);
                         opera.extension.postMessage({request: 'ping', type: 'css'});
                         this.display();
+                },
+                display: function() {
+                        var container = document.createElement('div');
+                        var whitelist = lists.whitelist.get();
+                        for(i in whitelist) {
+                                var element = document.createElement('span');
+                                var removeLink = document.createElement('a');
+                                var removeButton = document.createElement('img');
+                                removeButton.setAttribute('src', '/images/remove14.png');
+                                removeButton.setAttribute('style', 'vertical-align: middle;');
+                                removeLink.appendChild(removeButton);
+                                removeLink.setAttribute('onClick', 'whitelist.remove("' + whitelist[i] +'")');
+                                element.appendChild(removeLink);
+                                element.appendChild(document.createTextNode(' ' + whitelist[i]));
+                                container.appendChild(element);
+                                var br = document.createElement('br');
+                                container.appendChild(br);
+                        }
+                        
+                        var whiteParent = document.getElementById('whitelist');
+                        whiteParent.innerHTML = '';
+                        whiteParent.appendChild(container);
                 }
-        },
-        remove: function(rule) {
-                lists.whitelist.remove(rule, true);
-                opera.extension.postMessage({request: 'ping', type: 'css'});
-                this.display();
-        },
-        display: function() {
-                var container = document.createElement('div');
-                var whitelist = lists.whitelist.get();
-                for(i in whitelist) {
-                        var element = document.createElement('span');
-                        var removeLink = document.createElement('a');
-                        var removeButton = document.createElement('img');
-                        removeButton.setAttribute('src', '/images/remove14.png');
-                        removeButton.setAttribute('style', 'vertical-align: middle;');
-                        removeLink.appendChild(removeButton);
-                        removeLink.setAttribute('onClick', 'whitelist.remove("' + whitelist[i] +'")');
-                        element.appendChild(removeLink);
-                        element.appendChild(document.createTextNode(' ' + whitelist[i]));
-                        container.appendChild(element);
-                        var br = document.createElement('br');
-                        container.appendChild(br);
-                }
-                
-                var whiteParent = document.getElementById('whitelist');
-                whiteParent.innerHTML = '';
-                whiteParent.appendChild(container);
         }
-}
-whitelist.display();
+        whitelist.display();
+
+}