	<servlet>
        <servlet-name>SimpleCaptcha</servlet-name>
        <servlet-class>nl.captcha.servlet.SimpleCaptchaServlet</servlet-class>
        <!-- The width and height params are optional; 
        if unspecified they default to 200 and 50 respectively. -->
    </servlet>
    <servlet-mapping>
        <servlet-name>SimpleCaptcha</servlet-name>
        <url-pattern>/captcha.png</url-pattern>
    </servlet-mapping>
