If then in PDF form

[Alexander33173657fq81]

I am trying to make an if then statement where if one item is selected in a drop down box it auto populates a text box with pre defined text, but if the other option is selected it's a blank textbox.

What's the best way to do this?

[Thom Parker]

Make the predefined text the export value of each item in the dropdown. Then use a Custom keystroke script to fill the text box. Like this:

if(!event.willCommit) this.getField("TextField").value = event.changeEx;

[try67]

Should the text in the text field be the same as the selected item in the drop-down, or something else?

Should the user be able to enter something into the text field, if one of the other options is selected in the drop-down?