JAVA SCRIPT

<!script language="JavaScript">
<!--
function Validator(theForm)
{
  if (theForm.User.value == "")
{
  alert("Please enter a value for the \"User\" field.");
  return (false);
}

return (true);
}

//-->
</script> 
      

<form name="form1" method="POST" action="" onSubmit="return Validator(this)">
<input name="User" type="text" maxlength="5">
<input type="submit" name="Submit" value="login">
<input type="reset" name="Reset" value="Reset">
</form>