This doesn’t work in the Service Portal. Do you have a solution for this on the Service Portal or something we can add to the UI Script to handle the Service Portal?

User may use Reference Qualifier which can limit the list of groups or list of record on reference field. Also user may use javascript or script include to do the logic.

User may use this link for reference.
http://wiki.servicenow.com/index.php?title=Reference_Qualifiers#JavaScript_Example:_Limiting_the_Assigned_to_Field_by_Users_with_a_Specified_Role

If I read this correctly in the SNow wiki release notes sections, both g_form.enableOption and g_form.disableOption were enabled in Fall 2010 Stable 3, but they were both removed as of the June 2011 Preview 1. If this is correct Mark, your functions are still the only way to perform these tasks.

You’ll have to contact ServiceNow support about this one then. I don’t know why that wouldn’t be working but it’s specific to their API or a unique configuration in your instance.

I already used the g_form before that disableOption. But, I’m getting error like below:

onChange script error: TypeError: g_form.disableOption is not a function function onChange_kb_knowledge_topic_2(control, oldValue, newValue, isLoading, isTemplate) { if (isLoading) { return; } var topicField = g_form.getValue(‘topic’); alert(topicField); alert(g_scratchpad.isNewsDL1); alert(g_scratchpad.isNewsDL2); if((topicField == ‘News’) && g_scratchpad.isNewsDL1 == true && g_scratchpad.isNewsDL2 == false){ g_form.disableOption(‘category’,’Help Desk Portal Alert’); } if((topicField == ‘News’) && g_scratchpad.isNewsDL1 == false && g_scratchpad.isNewsDL2 == true){ g_form.disableOption(‘category’,’Scrolling News’); } }

Please let me know how to fix this issue.
Thanks & Regards!
Prasanna Kumar Duvvuri

As noted above, you should use the standard ‘g_form.enableOption’ and ‘g_form.disableOption’ included in ServiceNow. There’s no further need for a UI script.