store jsp value of one page in another

I had a jsp page and index.jsp


<form method="post">

<select name ="getselected" id="getselected">
<option>fox</option>
<option>fox2</option>
<option>fox3</option>
</selected>

<input type="hidden" name="hidden" value="<%=getselected%>">

</form>


 
which had a drop down list...
I get that value in server...
and set it to request

String selected_value = request.getParameter("getselected");
request.setAttribute("selected_value", selected_value );



now in index2.jsp

I imported this class and

used

Selected is <%=request.getAttribute("selected_value") %>


I got the value, i mean i got the output something like
selected is fox

but once i reload the page

I get output like

selected is null

how to store the value and when value is changed in index.jsp how to
reflect it in index2.jsp automatically...