ACC SHELL

function isNumeric(sText, notZero) {
  var ValidChars = "0123456789";
  var IsNumber=true;
  var Char;
  if(sText.length < 1) {
    IsNumber=false;
  }
  for (i = 0; i < sText.length && IsNumber == true; i++) {
    Char = sText.charAt(i);
    if(i == 0 && notZero && Char == '0') {
      IsNumber = false;
    }
    if (ValidChars.indexOf(Char) == -1) {
      IsNumber = false;
    }
  }
  return IsNumber;
}