Can someone help to make this work in life cycle

I have this script on a acroform and it works great, but when try in live cycle it does not do anything, Can someone think of the reason? Essentially the value in drop down is populated in text filed but want t make a 1d barcode so using barcode font!

1. event.value = ""; // clear the field;

var oField = this.getField("NAME1");if(oField != null) {// populate if not null;// get the value of the field object and add guard bits and LA;

1. event.value = "*LA" + oField.value + "*";}