I've created a simple module with a half dozen form fields and have been able to use the onClick event and javascript to modify the action attribute so that the form posts to an external site.  The trouble is that the external site is expecting a form field id of "x_login" but dnn changes it to something cryptic like "dnn$ctr372$ViewPayments$ViewPayments$x_login" and the external site doesn't recognize it.

1. Can dnn be configured to not change the id's?
2. The id prefix it uses seems to be consistent on my development machine but can I expect it to be the same when I publish the module so maybe I can try and do some kind of javascript trick to make it work?
 

This is nothing to do with DNN it is standard ASP .Net.  The control id's are generated so that in controls like grids the name is unique at the browser.

She standard approach is to use the control's ClientID (I think) property at the server.  This tells you what ID will be sent to the browser.  You use that knowledge to generate or modify your javascript so that when the script arrives at the browser it can correctly reference the control.

 I'm not an expert here, but AIUI what you are doing may be constrained by browser security as a cross site scripting attack.