Cannot find JSP file through web.xml

Question

Content of a.jsp
function Thisthing (id, name) {
this.id = id;
this.descr = name;
I want to access a.jsp from b.jsp. like
<script type="text/javascript" src="a.js"></script>
I have web.xml content
<servlet>
<servlet-name>DomainObjectis</servlet-name>
<jsp-file>/a.jsp</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>DomainObjectis</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
However its showing me an error -> .Thisthing undefined whenever I run this in Tomcat 5.5.
I appears its not finding my a.jsp file. It's working fine when I do
<%@ include file="a.jsp" %>

Answer 1

thanks for replying jgalacambra.
I have deployed several web applications before. But this is the first one where I am trying to include a JSP file as a javascript.
tomcat recognizes when I simply including the jsp file with import but when I try to include it as a script it's not working. So I am hoping that there are some experts here who can help me. I saw this being done in a project and am trying to build a similar web application myself.