Create a custom button to modify custom fields in zoho Inventory

Create a custom button to modify custom fields in zoho Inventory

I am needing a script for two buttons,
1. Button will add todays date to a custom field named cf_sent_to_sov
2. Button will mark a checkbox or unmark a checkbox field named cf_parts_ordered

I have been trying to figure out deluge but have not got anywhere trying to implement this