---
title: "Forms - Form Field Ui On Change"
slug: "forms-form-field-ui-on-change"
updated: 2023-03-22T22:24:59Z
published: 2023-03-22T22:24:59Z
canonical: "docs.interprose.com/forms-form-field-ui-on-change"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.interprose.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Form Field UI On Change

Form field validation can be set using custom JavaScript in Ui On Change.

## **Default state (before field changes)**

- Set with trigger: onBeforeAccountFormView
- Set Using JavaScript
- Set in the action path associated with the trigger

## **When field changes**

- Behavior occurs when the data in the associated field changes
- Set using JavaScript
- Will vary based on the JavaScript use din the form field's Ui on Change property

### **Setup**

JavaScript can be entered under **Setup - Forms - Form - Form Fields - Selected Form Field - Ui On Change**

![mceclip1.png](https://cdn.document360.io/6c7303ca-5ffc-4149-8868-8ea498eee635/Images/Documentation/java.png?sv=2026-02-06&spr=https&st=2026-10-31T17%3A50%3A09Z&se=2026-10-31T18%3A50%3A09Z&sr=c&sp=r&sig=FV4NNgwY%2F1T%2BJSTW6BV4EcVI5SNHLn0c4V%2Bfwn2g3EU%3D)

Here is an example of JavaScript that might be used in a Form Field's Ui On Change:

```
if (this.value === '0'){document.getElementById('formCellLabel.MVTO.ACCURATE_LETTER').style.visibility = 'visible';document.getElementById('formCellField.MVTO.ACCURATE_LETTER').style.visibility = 'visible'; }
```

<font color="#0000ff" size="2" style="box-sizing: border-box;"><strong style="box-sizing: border-box; font-weight: bold;"><em style="box-sizing: border-box;"><span style="font-family: Arial;">Watch the video below for additional guidance.</span></em></strong></font>