Unable to get URL Variable

Question

I've seen many posts about URL Variables, and I've tried implementing the solutions, but nothing seems to be working, so I'm hoping that someone out there might be able to help me with my situation.
I have built a JSP page in JDeveloper. The page must identify the visitor using an id (passed as a url variable) as well as an account_id entered by the user on the page. I've created a procedure in my ModuleImpl.java file that receives both the url variable and account_id and then calls a pl/sql transaction I've created in the database.
Thing is, if I take the procedure, which I've allowed to be shared to the Client interface, and plop it on my JSP Page, I get two inputs, one for the account_id and one for the url variable, meaning the user has to enter the url variable in the field for the procedure to work.
I've tried modifying the value of the field and setting it equal to #{param.id}, but when I run the page, the input becomes a display field and is not sent to my java procedure. I've also tried the FacesContext way of getting a url parameter, but I can't get that to work in my java file.
What I would like to have (or at least what my intensions were when I started this project) is to have the url variable field be hidden and automatically populated with the url variable so that when the customer enters their account_id and clicks submit, both the account_id and url variable are passed.
Any idea on how to implement something like this?

Answer 1

You can try setting the value of the parameter in the
pagedef.xml file for your page directly using
expression language.Thanks for your reply! I did that, or at least I think I did. Here is the NameData tag in my pagedef.xml file:
<NamedData NDName="web_hash" NDType="java.lang.String"
NDValue="${bindings.save_new_password_web_hash}"/>
what I've tried doing, is changing the NDValue to the three values below, all of which didn't work (returned null):
NDValue ="${param.id}"
NDValue ="#{param.id}"
NDValue ="${facesContext.externalContext.requestParameterMap['id']}"
is there a different expression I should be using?
Also, I will take a look at the solution you likend to.