function Commas(Number){
  Number = String(Number);
  if (Number.split('.').length > 1) return Number;
  else if (Number.length > 3){
    var Mod = Number.length%3;
    var Change = (Mod > 0 ? (Number.substring(0,Mod)) : '');
    for (j=0; j<Math.floor(Number.length/3); j++){
      if (Mod == 0 && j == 0)  Change += Number.substring(Mod+3*j, Mod+3*j+3);
      else Change += ","+Number.substring(Mod+3*j, Mod+3*j+3);
    }
    return Change;
  }
  else return Number;
}