function currency_convert(element)
{
  var conversion_constant = 30.1260;
  var value = element.value;
  var currency = element.name;
  
  value = value.replace(/,/, '.');
  value = value.replace(/[^0-9.]/g, '');
  
  var dot = false;
  var new_value = '';
  for (var i = 0; i < value.length; i++)
  {
    if (value[i] == '.')
    {
      if (dot)
        continue;
      else
        dot = true;
    }

    new_value += value.substring(i,i+1);
  }
  
  value = new_value;
  
  element.value = value;
  
  if (currency == 'SKK')
  {
    var conversion = value / conversion_constant;
    document.forms['euro_calc'].elements['EUR'].value = conversion.toFixed(2);
  }
  else
  {
    var conversion = value * conversion_constant;
    document.forms['euro_calc'].elements['SKK'].value = conversion.toFixed(2);
  }
}