TAke data from page through session

[Heshawa De Silva]

<html:form method="POST" action="/home">
                                <div id="buttonLine">
                                    <html:image src="Pages/Home page resources/myReq.png" onclick="home.do" value="My Requests" styleId="buttons"/>
                                    <html:image src="Pages/Home page resources/pendingReq.png" onclick="home.do" value="Pending Requests" styleId="buttons"/>
                                    <html:image src="Pages/Home page resources/completedReq.png" onclick="home.do" value="Completed Requests" styleId="buttons"/>
                                    <html:image src="Pages/Home page resources/approveReq.png" onclick="home.do"value="Approve Completion" styleId="buttons"/>
                                </div>
</html:form>

This gives me an error message.
How to solve it?

[Shailesh Narkhede]

What error message it is giving?