js把数字转换为金额格式，如1000000换为1,000,000.00,以及反向改回

function outputmoney(number) {
    number = number.replace(/\,/g, "");
    if(isNaN(number) || number == "")return "";
    number = Math.round(number * 100) / 100;
      if (number < 0)
        return '-' + outputdollars(Math.floor(Math.abs(number) - 0) + '') + outputcents(Math.abs(number) - 0);
      else
        return outputdollars(Math.floor(number - 0) + '') + outputcents(number - 0);
}
    //格式化金额
function outputdollars(number) {
  if (number.length <= 3)
    return (number == '' ? '0' : number);
  else {
    var mod = number.length % 3;
    var output = (mod == 0 ? '' : (number.substring(0, mod)));
    for (i = 0; i < Math.floor(number.length / 3); i++) {
      if ((mod == 0) && (i == 0))
        output += number.substring(mod + 3 * i, mod + 3 * i + 3);
      else
        output += ',' + number.substring(mod + 3 * i, mod + 3 * i + 3);
    }
    return (output);
  }
}
function outputcents(amount) {
  amount = Math.round(((amount) - Math.floor(amount)) * 100);
  return (amount < 10 ? '.0' + amount : '.' + amount);

}

//反向改回

function tran2(id)
{
 var v;
 v = id.replace(/,/g,"");
}