Adress fields being populated based on chosen dropdown field

As 'Validate' script of dropdown field, use this (just fill in your info):

var name = this.getField("Name Surname");
var street = this.getField("Street");
var city = this.getField("City");
var postal = this.getField("Postal code");
var country = this.getField("Country");

switch(event.value){
case "Name1":
name.value = "some name1";
street.value = "some street1";
city.value = "some city1";
postal.value = "some postal code1";
country.value = "some country1";
break;

case "Name2":
name.value = "some name2";
street.value = "some street2";
city.value = "some city2";
postal.value = "some postal code2";
country.value = "some country2";
break;

case "Name3":
name.value = "some name3";
street.value = "some street3";
city.value = "some city3";
postal.value = "some postal code3";
country.value = "some country3";
break;

default:
name.value = "";
street.value = "";
city.value = "";
postal.value = "";
country.value = "";}