How do you highlight a field if it's empty?

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I want to highlight or color a field when it's empty, how do you do it?

I've been trying out this formula but I think it's not correct because there's a Syntax Error:

var a1 = this.getField("FirstN");

if (a1.value == null)

{

a1.style.backgroundColor = "yellow";

}

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try67Correct answer

Community Expert

You have quite a lot of errors there... Try this code (as the field's custom validation script):

event.target.fillColor = (event.value=="") ? color.yellow : color.transparent;

Bernd Alheit

Community Expert

Not all is possible in Acrobat Reader for iOS or Android:

https://www.adobe.com/devnet-docs/acrobatetk/tools/Mobile/iosapi/index.html

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try67

Correct answer

Community Expert

You have quite a lot of errors there... Try this code (as the field's custom validation script):

event.target.fillColor = (event.value=="") ? color.yellow : color.transparent;

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T

turnm

Participating Frequently

This works great in Acrobat Pro, but the field colors won't change in Acrobat reader which is were most users fill out the form. Is there a way to code this in Pro so that the field colors will change in Acrobat reader?

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try67

Community Expert

It will work exactly the same in Reader. If you don't see it working then make sure to disable the fields highlighting in the application.

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