What do you mean by the changes in the combo box? If you add other countries for example?
No. I mean when a user selects an option on the combobox. How I listen to event?
i added this to your code to get the val but what Gil mentioned might be better:
var el = document.getElementById("selectNumber");
var val = el[el.selectedIndex].value;
sym.$('chosenCountry').html('The country you chose is: '+ val + '.');
Sample here: https://app.box.com/s/sm5loqk33e6uocx4b4lv
I saw that page before, but I couln't make it work. I just tried again and I made it work. Thanks.