Niall - thank you for your help.I'm still in need of help, as I haven't quite got it figured out yet.I reviewed another forum posting of yours that gave a user a more complete scripting, and I hope that you can do the same for me.That posting was as follows:You can change the background colour at runtime with this script in the exit event:var vName = this.somExpression;var fieldObj = xfa.resolveNode(vName + ".ui.#choiceList.border.fill.color"); if (this.rawValue == "January") { fieldObj.value = ...