--- build.xml.original	2010-10-07 19:04:29.741006000 +0200
+++ build.xml	2010-10-07 19:20:09.022959840 +0200
@@ -280,5 +280,21 @@ Build-Date: ${build.tstamp}
 
 	</target>
 
+        <target name="javadoc" description="generate javadoc documentation">
+        <javadoc
+            destdir="javadoc"
+            defaultexcludes="yes"
+            author="true"
+            version="true"
+            use="true"
+            access="protected"
+            windowtitle="josm javadoc"
+            failonerror="true">
+            <packageset dir="src">
+                <include name="org/openstreetmap/josm/gui"/>
+		<exclude name="org.xnap.*" />
+            </packageset>
+        </javadoc>
+        </target>
 
 </project>