Change the id value on the new user form so as not to conflict with the portal's login form

The new user field uses id="pw" and id="eid" on its form fields. When this tool is inlined, and no one is logged in (the normal case) - the portal's login box also has fields with id="pw" and id="eid" leading to errors in the validation code in the new user form.

The solution is to rename the id's on these fields (not the names) and fix the JavaScript that references these ids. It would be far worse to change the id values on the portal as they are embedded deep in too many local skins as #pw and #id. This also avoids having skin tricks in portal.css mess up the UI for the new user code.