---
title: "Add a Custom Button\n"
url: "https://docs.frappe.io/erpnext/custom-button"
updated: "2026-02-26"
---


 frappe.ui.form.on("Event", "refresh", function(frm) {
 frm.add_custom_button(__("Do Something"), function() {
 // When this button is clicked, do this
 
 var subject = frm.doc.subject;
 var event_type = frm.doc.event_type;
 
 // do something with these values, like an ajax request 
 // or call a server side frappe function using frappe.call
 $.ajax({
 url: "http://example.com/just-do-it",
 data: {
 "subject": subject,
 "event_type": event_type
 }
 
 // read more about $.ajax syntax at http://api.jquery.com/jquery.ajax/
 
 });
 });
 });