Using a dropdown to prefill data

Question

I've seen numerous ways to do this, but I don't really know Javascript enough to get it to work.

Basically I have a form I'm creating that I want to autofill most of the data based on a dropdown menu. I have the menu created. It is called "Designation" with three possible choices, A, B, C. I have a text box below that, that I want to autopopulate with data based on the choices in Designation.

If Designation = A, fill the text box with "123"

If Designation = B, fill the text box with "456"

If Designation = C, fill the text box with "789"

What would be the proper code for this, and will it fill based on clicking the dropdown and not a trigger with the text box?

Thanks.

Nesa Nurani · Accepted Answer

As 'Validation' script of dropdown field use this and change "Text1" to your actual text field name:

var txt = this.getField("Text1");
if(event.value == "A") txt.value = "123";
else if(event.value == "B") txt.value = "456";
else if(event.value == "C") txt.value = "789";
else txt.value = "";

Changing value in dropdown will trigger script.

In dropdown field properties under options tab check 'Commit selected value immediately'.

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