// The <pre> tag enables the code to be viewed in a browser...
// <pre>
// worldpay_currency.php
// By: Nick Sumner, dev@nicksumner.com 
// ECommerce Integration - http://www.tele-pro.co.uk/
// Running in JavaScript mode
// Rates Date: 2010-09-02
// Data Cached: true

// variable indicates if data cached
var fromCache = true;

// variable for date of cache
var ratesDate = '2010-09-02';

// variable contains raw data 
var rawCurrencyData = '#Thu Sep 02 00:01:52 GMT 2010\n' + 
'GBP_USD=1.5985858130708306\n' + 
'rateDateString=2010-09-02\n' + 
'rateDateMillis=1283385600000\n' + 
'lastUpdated=1283385712000\n' + 
'allRatesCurrent=false\n' + 
'GBP_GBP=1.0\n' + 
'GBP_EUR=1.2604161579049362';

// variable for text list
var htmlCurrencyList = 'USD (1.599)<br>GBP (1.000)<br>EUR (1.260)<br>';

// variable for table list
var htmlCurrencyTable = '<table class=CurrencyTable cellspacing=0 cellpadding=2 border=1><tr><td> USD </td><td> 1.599 </td></tr><tr><td> GBP </td><td> 1.000 </td></tr><tr><td> EUR </td><td> 1.260 </td></tr></table>';

// define Array for Currencies
var WorldpayCurrencies = new Array();
WorldpayCurrencies['USD']='1.59858581';
WorldpayCurrencies['GBP']='1.00000000';
WorldpayCurrencies['EUR']='1.26041616';

// Convert amount with Worldpay currency rate
function WorldpayConvert(amount, currency, dp){
  var result=0;
  // get the rate
  var rate = WorldpayCurrencies[currency];
  // does the currency exist?
  if (rate == 0) return result;
  // convert the amount to the currency
  result = (amount * rate);
  // number format dp
  result = numberFormat(result, dp);
  // return
  return result;
}

// format number n to p decimal places
function numberFormat(n, p){
  var d = Math.pow(10,p);
  var r = (Math.round(d * n) /d);
  return r;
}