function IsEmpty(x) {
  if ((x.value.length == 0) || (x.value == null)) {
    return true;
  } else { 
    return false;
  }
}
function IsNotEmpty(x) {
  if (x.value.length > 0) {
    return true;
  } else { 
    return false;
  }
}
function IsNumeric(x) {
  var ValidChars = "0123456789.";
  var IsNumber=true;
  var Char;
  for (i = 0; i < x.length && IsNumber == true; i++) {
    Char = x.charAt(i); 
    if (ValidChars.indexOf(Char) == -1) {
      IsNumber = false;
    }
  }
  return IsNumber;
}
function winpop(url,width,height) {
  open(url, "pop", "toolbar=no,status=no,resizable=yes,scrollbars=auto,width=" + width + ",height=" + height);
}