Get exchange rates from https://openexchangerates.org/

forex

rExchange = function(symbol, apikey){
if (symbol === undefined || symbol.length !==3 ){
	return null;
}
if (apikey === undefined && apikey.length !==32){
	return null;
}
var xhr = new XMLHttpRequest();
xhr.open('GET', encodeURI("https://openexchangerates.org/api/latest.json?app_id="+apikey));
rate = 
xhr.onload = function() {
    if (xhr.status === 200) {
    	rates = JSON.parse(xhr.responseText).rates;
      localStorage.setItem("__rates", JSON.stringify(rates) );
      localStorage.setItem("__rateDate", (new Date()).toString());
      if (symbol.length == 3 && rates.hasOwnProperty(symbol))
      	return ( rates[symbol] );
        
    }
    else {
    	return null;
        //console.log( xhr.status);
    }
};
xhr.send();

return rate
}


//rExchange();
console.log( rExchange("GTQ") );