Catalog item Variable selection validation

[surajsukuma]

In one of my catalog items, there is a field called Priority Rating. First task owner will update this,

is there any option to popup if the task owner selected the value, and if the selected value has already been updated in another catalog item? Ex. selected Priority 2 and the same 2 already selected and saved in the previous request, then should not be allowed to select in the new request like that. 

Thanks in advance 

[Ankur Bawiskar]

@surajsukuma 

As mentioned by Mark you can use onChange catalog client script on that variable and use GlideAjax

Where are you stuck?

If my response helped please mark it correct and close the thread so that it benefits future readers.