Yes, I tried history.go(-1) and also window.history.back() and 
window.history.go(-1). 

Any other ideas?

Thanks. 

Did you try with history.go(-1)?
> 
> -----Original Message-----
> From: bmcelhany@h... [mailto:bmcelhany@h...] 
> Sent: Thursday, January 17, 2002 5:26 PM
> To: JavaScript HowTo
> Subject: [javascript_howto] window.history.back using IE 5.5
> 
> 
> The following function returns a HTTP 404 error, looking for a page 
> called "undefined":
> 
> function goBack() {
>   document.location.href = history.back();
> }
> 
> It seems to work fine using IE 5.0, but not 5.5. Any ideas? Thanks in 
> advance!
> 
> Brian
> $subst('Email.Unsub').