GoToScale does not work

Hi list

I have a problem in my project with the goToScale function in the layer tree, which does not work. This is the output from the firebug:

document.carto_form.recenter_scale.options is undefined

goToScale("7426")layers.js (Linie 198)

javascript:goToScale('7426')()()javascri...e('7426') (Linie 1)

 document.carto_form.recenter_scale.options.add(newOpt);

And this is from the opera browser:

Javascript URL thread: "javascript:goToScale('7426')"

Error:

name: TypeError

message: Statement on line 198: Cannot convert undefined or null to Object

Backtrace:

  Line 198 of linked script .../layers/js/layers.js: In function goToScale

      document.carto_form.recenter_scale.options.add(newOpt);

  Line 1 of unknown script

    goToScale('7426')

stacktrace: n/a; see 'opera:config#UserPrefs|Exceptions Have Stacktrace'

In all my other projects it works well.. Does anybody can give me a hint?

Regards

Adrian Dahinden

********************************************

Dütschler & Naegeli

Vermessung + Geoinformation AG

Fliederweg 11, Postfach

3601 Thun

Telefon 033 / 225 40 50

Fax     033 / 225 40 60

a.dahinden@...

http://www.geo-thun.ch

********************************************