Internet Explorer "conditional compilation is turned off"

[SteveYoungGoogle]

I hope I am posting to the correct forum, but I have had no luck so
far at c.l.j. If not could someone please tell me where would be best
to post such a query.

I have written a small Javascript script to read through the
properties of a JSON file which includes namespaces.The JSON file was
converted from xml using the Badgerfish convention utilizing the tool
to be found here http://badgerfish.ning.com/

The script and JSON file work and don't give any errors in Firefox/
Firebug but give a "conditional compilation is turned off" error in
IE6.

Is the problem my script or the JSON file or IE?

The script is at http://members.chello.at/stephen.joung/testsite/indexJSON_ShowProperties5.html
Please click on the button"Click to load the JSON menu file" and the
JSON file will be loaded.

The JSON file is at http://members.chello.at/stephen.joung/testsite/test10.json
in case you would like to check it.

Thanks, Steve.

[Toby A Inkster]

On 2 Jan 2009, at 21:57, SteveYoungGoogle wrote:

> The JSON file is at http://members.chello.at/stephen.joung/testsite/
> test10.json
> in case you would like to check it.

IE has a funny feature called conditional compilation in its Jscript
engine. It is a set of directives which begin with @-symbols which
allow the JIT compilation of certain segments of Javascript to be
suppressed based on particular conditions. That is, these bits of
code will be ignored. Similar to pre-processor instructions for C
compilers.

Your JSON file includes "@xmlns" and "@currency". Although these are
not conditional compilation directives, they are valid conditional
compilation variable names. Now, I'm no expert on IE's Jscript
engine, but I believe that your "look" function tries to access
properties using the obj.prop syntax, rather than obj["prop"]. In the
case of the properties "@xmlns" and "@currency", IE interprets that
as an attempt to use conditional compilation, but as you've not
switched conditional compilation on (using the "@cc_on" directive),
this fails. The solution would be to use obj["prop"] syntax in look.

To be honest, Firefox should complain too, because I'm pretty sure
that the obj.prop syntax is illegal unless the property name is a
valid ECMAScript token name, which I believe "@xmlns" is not.

--
Toby A Inkster
<mailto:ma...@tobyinkster.co.uk>
<http://tobyinkster.co.uk>

[SteveYoungGoogle]

On Jan 3, 11:42 am, Toby A Inkster <m...@tobyinkster.co.uk> wrote:
> On 2 Jan 2009, at 21:57, SteveYoungGoogle wrote:
>

> > The JSON file is athttp://members.chello.at/stephen.joung/testsite/

> <mailto:m...@tobyinkster.co.uk>
> <http://tobyinkster.co.uk>

Thanks Toby, I have fixed the problem now according to your suggestion
and everything is working in both FF and IE. This thing has been
bugging me for weeks.

Thanks again, Steve.