Regarding mirror page script

[#1]

<%

 if ( document.mode != 'mirror' && document.mode != 'forward' ) { 

%>

can someone please guide us about the above-mentioned script?

what is document.mode and from where we get these values such as mirror and forward?

[#2 · Accepted solution]

This remove the mirror page when you are in the mirror page or forward the email.

Thanks,

David