<servlet>
    <servlet-name>SimpleCaptcha</servlet-name>
    <servlet-class>nl.captcha.servlet.SimpleCaptchaServlet</servlet-class>
    <init-param>
      <param-name>captcha-width</param-name>
      <param-value>300</param-value>
    </init-param>
    <init-param>
      <param-name>captcha-height</param-name>
      <param-value>100</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>SimpleCaptcha</servlet-name>
    <url-pattern>/simpleCaptcha.png</url-pattern>
  </servlet-mapping>