Undefined Value in drop down box countries and states

Posted on 2010-11-17
Last Modified: 2012-06-21
I am using this script here and am getting an undefined option on the country drop down as the last option. Does anyone know what would be causing this?

The same thing happens on my script.. it also happens on the original source link, it is the last country option.
Question by:nismor240sx
  • 2

Accepted Solution

leehanken earned 175 total points
Comment Utility
There is an error in the javascript file in the populateCountry function. The line which says:

  for (var loop = 0; loop < countryLineArray.length; loop++) {

should say

  for (var loop = 0; loop < countryLineArray.length-1; loop++) {

otherwise the loop goes on too many times and adds an invalid item to the list of countries.

Just insert the -1 and it will work.
// Populates the country selected with the counties from the country list

function populateCountry(defaultCountry) {

  if ( postCountry != '' ) {

    defaultCountry = postCountry;


  var countryLineArray = country.split('|');  // Split into lines

  var selObj = document.getElementById('countrySelect');

  selObj.options[0] = new Option('Select Country','');

  selObj.selectedIndex = 0;

  for (var loop = 0; loop < countryLineArray.length-1; loop++) {

    lineArray = countryLineArray[loop].split(':');

    countryCode  = TrimString(lineArray[0]);

    countryName  = TrimString(lineArray[1]);

    if ( countryCode != '' ) {

      selObj.options[loop + 1] = new Option(countryName, countryCode);


    if ( defaultCountry == countryCode ) {

      selObj.selectedIndex = loop + 1;




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LVL 63

Assisted Solution

Zvonko earned 75 total points
Comment Utility
Remove the last separator pipe character | from the country data string and the empty Option will go away:


Like this:


Author Closing Comment

Comment Utility
Thank you.

Author Comment

Comment Utility
You were both correct, thanks for helping me figure it out. Since my script is dynamic using ASP scripts and a database, the first answer was the easiest one for me to implement.

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