How to combine +two fields without submitting page (via AJAX/HTMLDB_Get)?

Question

Hi all,
After my last contribution "Request for Scott Spendolini" I was able to create the scripts to update fields in forms without having to refresh the page. Thanks again to Scott, Carl and the others who helped me solving my problem.
I have another question regarding this however. How do I combine two (or more) values on a form to fill a field with the values, for instance to create a unique Primary-key field?
This is the example: combine the postcode and the house-number (and maybe an extension to the housenumber) in one field 'adrescode'. This uniquely identifies an adress in the Netherlands. I can 'get' the postcode to fill the first part of the adrescode, but how do I modify the scripts to 'get' the housenumber (huisnummer) and - if not left null - the extension to the housenumber?
Here are the scripts I created to far:
in the region source of the page I have the following Javascript:
<script language="JavaScript1.1" type="text/javascript">
function f_P52_getAdrescode ()
var get = new htmldb_Get(null,&APP_ID.,'APPLICATION_PROCESS=P52_getAdrescode',0);
get.add('P52_POSTCODE',html_GetElement('P52_POSTCODE').value)
gReturn = get.get();
if(gReturn)
{  html_GetElement('P52_ADRESCODE').value = gReturn  }
else
{  html_GetElement('P52_ADRESCODE').value = 'null'  }
get = null;
</script>
and in the shared components of the application I have created an process P52_getAdrescode as follows:
declare
  l_adrescode varchar2(16);
begin
    l_adrescode := :P52_POSTCODE || :P52_HUISNR ;
    if :P52_HUISNRTOEVOEGING is null then
          NULL ;
    else
          l_adrescode := l_adrescode ||':'||:P52_HUISNRTOEVOEGING ;
    end if ;
    htp.prn(l_adrescode);
-- dbms_output.put_line(l_adrescode);
end;
I ran this PL/SQL in the SQL-section of HTMLDB and it does what a expect: combine the values in a new string.
In my page however, it only gets the value of postcode and puts this into the adrescode field.
So my question is: how do I modify the Javascript (I Guess) so that also the fields 'huisnummer' and 'huisnummertoevoeging' end up in the adrescode field?
Thanks for your help,
Jan.

Answer 1

Carl, Scott,
I have two pages with exact the same fields and codings (as described before in this Post.
I now have two different named functions and application processes, a javascript an process for each page. They both do the same thing, use the same code except for the page-number (:P52_ and :P92). I tried to make one process to replace both, but ran into problems when I changed the name in the get.add statement.
Changing the get.add from: get.add('P52_POSTCODE',html_GetElement('P52_POSTCODE').value) to: get.add('POSTCODE',html_GetElement('P52_POSTCODE').value) always ends up in what looks like a complete html-(source)dump of the page in the field that has to be updated. Even when I replace the :P52_POSTCODE in the application process as well Changing back the application process and the javascript to so that both javascript and process use the :P52_ again and the function returns the correct value again. What am I doing wrong?
I requested an online-workspace to post the application to it, but have no answer to my request yet, so I can't provide a working example at the moment....
Thanks for your help again,
Jan.