currency and price based on IP address

gistfile1.js

var DOLLAR = "DOLLAR";
var POUND = "POUND";
var EURO = "EURO";

function getCurrency(callback) {
  $.ajax({
	url: "http://api.hostip.info/get_json.php",
	timeout:1000 // timeout after 1 second and default to dollars
  }).done(function(json) {
	var country = "";
	try {
		country = json["country_code"];
	} catch(e) {
		// whoops
	}
	if ("GB" == country) { // UK
		doCallback(callback, POUND);			
	} else if (
		("AD" == country) // Andorra
		|| ("AT" == country) // Austria
		|| ("BE" == country) // Belgium
		|| ("CY" == country) // Cyprus
		|| ("EE" == country) // Estonia
		|| ("FI" == country) // Finland
		|| ("FR" == country) // France
		|| ("DE" == country) // Germany
		|| ("GR" == country) // Greece
		|| ("IE" == country) // Ireland
		|| ("IT" == country) // Italy
		|| ("LU" == country) // Luxembourg
		|| ("MT" == country) // Malta
		|| ("MC" == country) // Monaco
		|| ("ME" == country) // Montenegro
		|| ("NL" == country) // Netherlands
		|| ("PT" == country) // Portugal
		|| ("SM" == country) // San Marino
		|| ("SK" == country) // Slovakia
		|| ("SI" == country) // Slovenia
		|| ("ES" == country) // Spain
		|| ("VA" == country) // Vatican City 
		) {
		doCallback(callback, EURO);
	} else {
		doCallback(callback, DOLLAR);
	}	  
  }).fail(function() {
	doCallback(callback, DOLLAR);
  });
}

function doCallback(callback, currency) {
  if (typeof callback == 'function') {
	callback.call(this, currency);
  }
}

getCurrency(function(currency) {
  var price = "";
  if (DOLLAR == currency) {
	price = "$25";
  } else if (POUND == currency) {
	price = "£15";
  } else if (EURO == currency) {
	price = "€19";
  }
  console.log("Price is " + price);
});