--- a/build.xml
+++ b/build.xml
@@ -150,5 +150,13 @@
   	<arg line="${version}" />
   </exec>
   </target>
+   <target name="javadoc" depends="compile">
+      <javadoc destdir="doc/api" source="8">
+      	<packageset dir="src"/>
+       <classpath>
+         <pathelement path="lib/junit3.8.1/junit.jar" />
+       </classpath>
+      </javadoc>
+   </target>
 
 </project>