how to hide Request approval button for particular change request

[Vani14]

we have created standard change we need to hide request approval button only for that change request. i have tried using script in UI policy but its not working. 

[Anurag Tripathi]

What is information standard change? 

Type = Standard right?

[Vani14]

@Anurag Tripathi yes type is standard change if short description contains informational standard change then request approval button need to be hide.

[Anurag Tripathi]

So append this in the condition

(current.type!='standard' && current.short_description.toString().IndexOf('informational standard change') >-1)

[Vani14]

@Anurag Tripathi i have added in the condition but request approval button is still showing in the form.

[Anurag Tripathi]

Can you show the form and the condition?