How to show choice values dynamically based on another field

[Priyanka77]

Hi,
I have a requirement to show choice values dynamically based on other field.
Scenario:
1. In record producer i have two fields in which field A' type is "lookup select box" and its populating few values based on reference qualifier of field A and currently has three values in it. 
2. And second field B' type is select box and have 4 choices in it.
Requirement is to show only two values in field B based on when 1 value selected in field A and if other value selected in field A then in field B it should show other two choices.

Please help me with this requirement!

Thanks in advance!
Priyanka

[palanikumar]

Hi,

You have to use client script for this requirement

use g_form.addOption for adding an option to the choice field

use g_form.removeOption for removing an option

Refer this article for reference

https://servicenowguru.com/scripting/client-scripts-scripting/removing-disabling-choice-list-options... 

[Priyanka77]

Thanks for the response.
I used onchange client script but its not working as expected.
Lookupselect box: field A
Selectbox: field B
var a=g_form.getValue('lookupselect box field');
if(a=='value of lookupselect box field'){
g_form.removeOption('selectbox field',',choice value of selectbox');
}

[palanikumar]

add a alert inside if block and make sure it is getting printed

[Priyanka77]

Thanks you. Alert is working but its taking only sys id even i tried getDisplayValue then also its not working. Could you please help me to understand how to get display value from "lookup select bos"field.