Updating Zoho Books UI when a field is changed

Updating Zoho Books UI when a field is changed

I have this script to update Quotes Expiry date.
estimateID = estimate.get("estimate_id");
numberDaysTobeExtended = 14;
estimatedate = estimate.get("date").toDate();
organizationID = organization.get("organization_id");
estDate = estimate.get("date");
expiryDate = estDate.addDay(numberDaysTobeExtended).toString("yyyy-MM-dd");
json = Map();
json.put("expiry_date",expiryDate);
result = zoho.books.updateRecord("Estimates",organizationID,estimateID,json,"updatequoteexpirydate");

I understand this is a server side script, but I need a client side script.

How do I now update the screen with the new date? The expiry date field does not change on screen when I change the Quote date.