[Old Pedant]

As Philip kept telling you, you can't use the code

document.orders

unless you have a <form> with that name.

You do *NOT* have such. You have a <form> with that ID!

You could fix this part by changing to

<form name="orders" method="post" action="done.htm">

But form names are considered obsolescent, anyway. So better to leave the <form> tag as you have it and simply change to using

document.getElementById("orders")

I would suggest this:

function initForm() {
   var form = document.getElementById("orders");
   form.date.value = todayTxt();
   form.qty1.focus();
   form.qty1.select();
}

************

You do have another problem, though. You can't use method="post" if the action= of a <form> is another HTML page. You can only use method="post" when the target action is a server-side page (e.g., a PHP or ASP or JSP or CGI page).

Now, if your <form> will never actually be submitted to the action page (which may well be the case for this page you are working on), then the method won't matter. But as a matter of good practice, if you are going to specify action="done.htm" then you should also specify method="get"