var str1 = '10,00 fr';
var str2 = '12.22 $';
function getCurrencySymbol(str) {
//replace all numbers, spaces, commas, and periods with an empty string
//we should only be left with the currency symbols
return str.replace(/[d., ]/g, '');
}
console.log(getCurrencySymbol(str1));
console.log(getCurrencySymbol(str2));