diff -r 03e4aaa4ef3d -r 2f19d1449fba htmlpage/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/Button.java
--- a/htmlpage/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/Button.java	Mon Sep 24 15:06:43 2012 +0200
+++ b/htmlpage/src/main/java/org/apidesign/bck2brwsr/htmlpage/api/Button.java	Tue Sep 25 09:08:39 2012 +0200
@@ -21,7 +21,7 @@
  *
  * @author Jaroslav Tulach <jtulach@netbeans.org>
  */
-public class Button extends Element {
+public final class Button extends Element {
     public Button(String id) {
         super(id);
     }
@@ -29,4 +29,8 @@
     @Override
     void dontSubclass() {
     }
+
+    public void setDisabled(boolean state) {
+        setAttribute(this, "disabled", state);
+    }
 }