Often times you need to alter what countries or states are able to be shipped to. The following javascript provide examples of how to do that, which need to be pasted right before the closing </head> tag of your checkout template.

That excludes everything that is not US, but you could do it differently to adjust for the countries you want. Using firebug to analyze FC.locations.config.locations and FC.locations.config.countries will give you some idea of the structure we're using.

<script type="text/javascript" charset="utf-8">
jQuery(document).ready(function(){
  var usIndex = -1;
  for (var i = 0; i < FC.locations.config.locations.length; i++) {
    if (FC.locations.config.locations[i].cc2 == "US") {
      usIndex = i;
    }
  }
  if (usIndex != -1) {
    FC.locations.config.locations = FC.locations.config.locations.splice(usIndex,1);
    FC.locations.init(); // Update the countries and regions based on the modified locations array
    FC.checkout.setAutoComplete("customer_country");
    FC.checkout.setAutoComplete("customer_state");
    FC.checkout.setAutoComplete("shipping_country");
    FC.checkout.setAutoComplete("shipping_state");
  }
});
</script>

This code prevents people from altering the country text input in the checkout form - so is especially useful when you only allow customers from a single country. Simply changing US and United States to match the country you're targeting will update to your specific country.

jQuery(document).ready(function() {
  jQuery('#customer_country, #shipping_country').val('US');
  jQuery('#customer_country_name, #shipping_country_name').addClass('fc_text_readonly').val('United States');
  jQuery('#customer_country_name, #shipping_country_name').attr('readonly', true).focus(function() {
    jQuery(this).blur();
  });
 
  // Update states
  FC.checkout.setAutoComplete("customer_state");
  FC.checkout.setAutoComplete("shipping_state");
});

Often you'll need to ship to only a few countries, like perhaps just the US and Canada. In that case, the following javascript will help you do that. Just change the includeCountries array to include the 2 character country codes of the countries you want to include.

<script type="text/javascript" charset="utf-8">
jQuery(document).ready(function(){
  var newCountries = [];
  var includeCountries = ["US", "CA"];
  for (var i = 0; i < FC.locations.config.locations.length; i++) {
    if (jQuery.inArray(FC.locations.config.locations[i].cc2, includeCountries) > -1) {
      newCountries.push(FC.locations.config.locations[i];
    }
  }
  FC.locations.config.locations = newCountries;
  FC.checkout.setAutoComplete("customer_country");
  FC.checkout.setAutoComplete("customer_state");
  FC.checkout.setAutoComplete("shipping_country");
  FC.checkout.setAutoComplete("shipping_state");
});
</script>

• http://forum.foxycart.com/comments.php?DiscussionID=1642&page=1#Item_1
• http://forum.foxycart.com/comments.php?DiscussionID=2834&page=1#Item_0
• http://forum.foxycart.com/comments.php?DiscussionID=3482&page=1#Comment_24000

Often times you need to remove certain states from being selectable in your checkout. You can achieve that using javascript to run through the locations array on the checkout and removing any states you don't want.

Add the following right before the closing </head> tag in your checkout template:

<script type="text/javascript" charset="utf-8">
jQuery(document).ready(function(){
  var usIndex = -1;
  for (var i = 0; i < FC.locations.config.locations.length; i++) {
    if (FC.locations.config.locations[i].cc2 == "US") {
      usIndex = i;
    }
  }
  var newregions = [];
  for (var i = 0; i < FC.locations.config.locations[usIndex].r.length; i++) {
    if (FC.locations.config.locations[usIndex].r[i].c != "HI" && FC.locations.config.locations[usIndex].r[i].c != "AK") {
      newregions.push(FC.locations.config.locations[usIndex].r[i]);
    }
  }
  FC.locations.config.locations[usIndex].r = newregions;
  FC.checkout.setAutoComplete("customer_country");
  FC.checkout.setAutoComplete("customer_state");
  FC.checkout.setAutoComplete("shipping_country");
  FC.checkout.setAutoComplete("shipping_state");
});
</script>

• http://forum.foxycart.com/comments.php?DiscussionID=1082