The JavaScript Source: Forms : Country State Drop Down

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Country State Drop Down

A simple international country and state drop down list that automatically repopulates the state section based on the country selected without page refreshes. Select a country and the country's states or provinces are listed on the right. If the country doesn't have any states or provines configured, a text box is displayed.

The JavaScript Source: Forms : Country State Drop Down

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/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Down Home Consulting :: http://downhomeconsulting.com */

/*
Country State Drop Downs v1.0.
(c) Copyright 2005 Down Home Consulting, Inc.
www.DownHomeConsulting.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. The software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, itness for a particular purpose and noninfringement. in no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

// If you have PHP you can set the post values like this
//var postState = '<?= $_POST["state"] ?>';
//var postCountry = '<?= $_POST["country"] ?>';
var postState = '';
var postCountry = '';

function TrimString(sInString) {
  if ( sInString ) {
    sInString = sInString.replace( /^\s+/g, "" );// strip leading
    return sInString.replace( /\s+$/g, "" );// strip trailing
  }
}

// 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; 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;
    }
  }
}

function initCountry(country) {
  populateCountry(country);
  populateState();
}

<form>
  <table border="0">
    <tr>
      <td>
        <select id='countrySelect' name='country' onchange='populateState()'>
        </select>
        </td>
        <td>
        <select id='stateSelect' name='state'>
        </select>
        <script type="text/javascript">initCountry('US'); </script>
      </td>
    </tr>
  </table>
</form>
<p><div align="center">
<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
</div><p>

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