Rounding function in GS2

function round(temp.number) {
    // Divide the number into whole and decimals.
  temp.tokens = temp.number.tokenize(".");
    // This means they've sent a whole number. Return the whole number
  if (temp.tokens.size() == 1) { return temp.number; }

    // Get the last decimal on the number.
  temp.last = temp.number.charat(temp.number.length() - 1);
    // Determine whether or not rounding is needed.
  temp.increment = (temp.last >= 5);

    // If it rounds up to another decimal...
  if (temp.tokens[1].length() > 1) {
    temp.last = temp.tokens[1].charat(temp.tokens[1].length() - 2) + temp.increment;
    temp.rounded = temp.tokens[1].substring(0, temp.tokens[1].length() - 2) @ temp.last;
    return temp.tokens[0] @ "." @ temp.rounded;
  } else {
    return int(temp.tokens[0] + temp.increment);
  }
}