var EuroCurs = 12.5;
var DolCurs = 8.5;

function EuroToGrn(CurrencySum)
{
  var retSum = CurrencySum * EuroCurs;
  document.write(retSum.toFixed(0));
}

function DolToGrn(CurrencySum)
{
  var retSum = CurrencySum * DolCurs;
  document.write(retSum);
}

function getEuroCurs()
{
document.write(EuroCurs);
}
function getDolCurs()
{
document.write(DolCurs);
}