use of event.value = this.getField("Text").value; and custom text

[Princeplanet]

I'm using Acrobat Pro 2017

I'm making a simple form for use at funerals. no big deal there.

I have a field called "1st Reading", which is a drop down. So the choices are OT-1, OT-2, OT-3, etc. Each of these has an export value of a Scripture verse that will be used. I also have as one of the choices OTHER, with no export Value. In the options tab, I also have checked allow user to enter custom text.

I have another field called "OT Reading" that uses "event.value = this.getField("1st Reading").value;" as a custom calculation script. It pulls the export value  from the "1st Reading" and fills in the blank fine.

My question. Is there a way to allow custom text when "OTHER" is selected from the drop down menu. The other values (OT-1, OT-2, etc.) would stay the same.  Families may want to use a Scripture verse that is not listed as an option. ATM, when I type in a scripture value, it just erases. If I type in, let's say "custom" in the "1st Reading" field, it just returns "custom" in the "OT Reading" field

Thanks for your help.

[Nesa Nurani · Accepted solution]

As 'Validation' script of dropdown field ("1st Reading") use this:

var f = "";
for(var i=0; i<event.target.numItems; i++){
if(event.target.getItemAt(i, false)==event.value){
f = event.target.getItemAt(i, true);}}
this.getField("OT Reading").value = f;

[Princeplanet]

Thank you so much for your response!

However, it's not working. When I choose "OTHER" the fill in for OT Reading is "OTHER." When I went to type in a custom text, it just reverted to "OTHER."

Would seeing the file help? There isn't any private info to it.

https://drive.google.com/file/d/16Ukh89ce4UVbs2cWHG53DLXcFUIVWC3B/view?usp=sharing

[Nesa Nurani]

Remove script from "OT Reading" field.

[Princeplanet]

Works! Thank You!