diff -r 0a115f1c6f3c -r 7df624c2a0a1 emul/src/main/java/java/lang/Number.java
--- a/emul/src/main/java/java/lang/Number.java	Fri Sep 28 17:59:03 2012 +0200
+++ b/emul/src/main/java/java/lang/Number.java	Sun Jan 13 23:07:54 2013 +0100
@@ -25,6 +25,8 @@
 
 package java.lang;
 
+import org.apidesign.bck2brwsr.core.ExtraJavaScript;
+
 /**
  * The abstract class <code>Number</code> is the superclass of classes
  * <code>BigDecimal</code>, <code>BigInteger</code>,
@@ -46,6 +48,10 @@
  * @see     java.lang.Short
  * @since   JDK1.0
  */
+@ExtraJavaScript(
+    resource="/org/apidesign/vm4brwsr/emul/java_lang_Number.js",
+    processByteCode=true
+)
 public abstract class Number implements java.io.Serializable {
     /**
      * Returns the value of the specified number as an <code>int</code>.