I am trying to write a simple login script where I list member's User ID, Password and membership expiration date in an if statement. When the member logs in, the script is supposed to check the username and the password and compared the expiration date to today's date.

I can not get it to work. The code is below:

function Login(){
var done=0;
var username=document.login.username.value;
username=username.toLowerCase();
var password=document.login.password.value;
password=password.toLowerCase();
var today = new Date();

if (username=="test" && password=="1111" && today<="January 01, 2011" ) { window.location="index.html"; done=1; }
if (username=="test" && password=="2222" && today<="January 01, 2010" ) { window.location="index.html"; done=1; }
if (done==0) { window.location="error.html"; }
}

Can someone help me format the dates so they will work?

Have to wonder why you are doing this in JavaScript. It means (a) anybody can see what the username and password are and (b) anybody could simply reset their computer clock to before the expiration time.

But I will hope and assume this is for a "toy" site and you are just experimenting with concepts.
I should also point out that "done=1" will never matter, because the browser will immediately jump to "index.html" and done will never get set.

You help is much appreciated.

Yes, this WAS for a toy (demo) site but the owner never understood what we were talking about so he wouldn't pay to update it to a secure login after we launched the site. It's worked for 5 years now so it's even harder to get him to spend the money. If he don't care we don't care!