Why not use:
$output = qq|<a href="$ENV{HTTP_REFERER}">Go Back</a>|;
or even just
$output = qq|<a href="javascript:go(-1)">Go Back</a>|;
Installations:http://wiredon.net/gt
MODS:http://wiredon.net/gt/download.shtml
$output = qq|<a href="$ENV{HTTP_REFERER}">Go Back</a>|;
or even just
$output = qq|<a href="javascript:go(-1)">Go Back</a>|;
Installations:http://wiredon.net/gt
MODS:http://wiredon.net/gt/download.shtml