Getting request.getAttribute is coming as null

Question

I am trying to dynamically display a value in a pop up window (servicePop.jsp) that is called from another jsf page(Interface.jsp). But its value is coming as null.
Plz find the essential code(not entire code) I have pasted below..
--Interface.jsp*
<h:panelGroup>
<h:outputText value="Service Type"/>    
<h:selectOneMenu id="lstService" value="#{UserBean.serviceType}">
<f:selectItems value="#{UserBean.serviceItems}"/>
</h:selectOneMenu>
</h:panelGroup>
<h:panelGroup>
<h:commandButton action="#{UserBean.submit}" id="submitButton" value="Generate"/>
<c:choose>
<c:when test="${UserBean.responsexml == null}">
     <script type="text/javascript">
                   window.open('servicePop.jsp','AdviserSearchResults','width=400,height=450,left=20,top=20,menubar=no,location=no,resizable=yes,scrollbars=yes,status=yes');
     </script>
</c:when>
</c:choose>
</h:panelGroup>--UserBean.java*
public void setServiceType(String serviceType) {
          this.serviceType = serviceType;
          super.getRequest().setAttribute("hdService", serviceType);
}--servicePop.jsp*
<tr>
<td valign="top" colspan="3"><div style="padding-bottom:10px;"><strong>Webservice error</strong></div>
<br>
Order does not exist for <%=request.getAttribute("hdService") %>. Please choose proper service type<br>
               <br>
</td>
</tr>So the text is coming as "Order does not exist for null."
May I know why hsService is coming as null ?

Answer 1

I am trying to call js code for window pop up of another jsp page.
But the value of service seems coming as null. Once I click the submit button, I hope hdid hidden field gets the value from #{UserBean.serviceType}
But I found its coming as blank, since I am getting blank Javascript Alert window.
Please find the code below below,
--Interface.jsp*
<f:view>
<h:form name="wnLoginForm">
<h:panelGroup>
<h:outputText value="Service Type"/>   
<h:selectOneMenu id="lstService" value="#{UserBean.serviceType}">
<f:selectItems value="#{UserBean.serviceItems}"/>
</h:selectOneMenu>
</h:panelGroup>
<h:panelGroup>
<h:commandButton action="#{UserBean.submit}" id="submitButton" value="Generate"/>
<c:choose>
<c:when test="${UserBean.responsexml == null}">
    <h:inputHidden id="hdid" value="#{UserBean.serviceType}"/>                             
     <script type="text/javascript">
    var myform = document.getElementById('wnxInterface_4:wnLoginForm1');
    var service = document.getElementById(myform.name+":hdid").value;          
    alert(service);
     window.open("servicePop.jsp?value="+serviceid,'AdviserSearchResults',"width=400,height=450,left=20,top=20,menubar=no,location=no,resizable=yes,status=yes");
    </script>
</c:when>
</c:choose>
</h:panelGroup>
</h:form>
</f:view>--UserBean.java*
public void setServiceType(String serviceType) {
          this.serviceType = serviceType;
}So I need hdid hidden field to gets its value once user clicks the submit button, so that I can pass it as a parameter to another jsp page through JS.