Custom script to show a field if values are equal to or greater than 1

[Natalie_Ping]

I'm new to editable PDF's and a novice at Javascript. I have three number fields (Text11, Text19, Text27) that if the value inside any one of them is one or higher - I need it to unlock another box below (OTHER1). Does anyone know how I programme this with custom script? 

Thanks!

[try67 · Accepted solution]

You can do it using this code as the custom calculation script of the text field:

var v1 = Number(this.getField("Text11").valueAsString);
var v2 = Number(this.getField("Text19").valueAsString);
var v3 = Number(this.getField("Text27").valueAsString);
event.target.readonly = (v1>=1 || v2>=1 || v3>=1);

[Natalie_Ping]

Thank you! That has worked!