--- a/Jint.Runtime/VM/Box.cs	Sun Oct 27 21:20:59 2013 +0400
+++ b/Jint.Runtime/VM/Box.cs	Mon Oct 28 00:49:15 2013 +0400
@@ -3,6 +3,7 @@
 using System.Linq;
 using System.Text;
 using Jint.Runtime.VM.OpCodes;
+using System.ComponentModel;
 
 namespace Jint.Runtime.VM {
     class Box<T>: AbstractBox, IGettter<T>, ISetter<T> {
@@ -10,6 +11,7 @@
         public T holdingValue;
         object[] m_impl;
         RuntimeContext m_runtime;
+        TypeConverter m_converter;
 
         public Box(T value, RuntimeContext runtime): base(typeof(T)) {
             if (runtime == null)
@@ -27,6 +29,14 @@
             }
         }
 
+        TypeConverter TypeConverter {
+            get {
+                if (m_converter == null)
+                    m_converter = TypeDescriptor.GetConverter(typeof(T));
+                return m_converter;
+            }
+        }
+
         public T Get() {
             return holdingValue;
         }
@@ -45,14 +55,18 @@
             frame.SetValue(dest, op(holdingValue));
         }
 
-        public override void InvokeCompareOperation(int arg2, int dest, Frame frame) {
+        public override int InvokeCompareOperation(int arg2, Frame frame) {
             var op = (CompareOperation<T>)Impl[(int)Codes.Cmp];
-            frame.SetValue(dest, op(holdingValue, frame.GetValue<T>(arg2)));
+            return op(holdingValue, frame.GetValue<T>(arg2));
         }
 
-        public override void InvokeEqualityOperation(int arg2, int dest, Frame frame) {
+        public override bool InvokeEqualityOperation(int arg2, Frame frame) {
             var op = (EqualityOperation<T>)Impl[(int)Codes.Cmp];
-            frame.SetValue(dest, op(holdingValue, frame.GetValue<T>(arg2)));
+            return op(holdingValue, frame.GetValue<T>(arg2));
+        }
+
+        public override T2 Convert<T2>() {
+            return (T2)TypeConverter.ConvertTo(holdingValue, typeof(T2));
         }
     }
 }