use URI::Escape;
 
  
 my $start = "http://www.xxxx.com/programs_results/";
           my $mech = WWW::Mechanize->new( autocheck => 1 );
           $mech->get( $start );
           my @links = $mech->find_all_links( url_regex =>
           qr/\d+.+\.pdf$/ );   
             
           chdir $progdest or die "Can't change
           directory: $!\n";
          
           for my $link ( @links ) {
           my $url = $link->url_abs;
           my $filename = URI::Escape::uri_escape( $link-
           >url_abs->path );
           $filename =~ s[^.+/][];
           mech->get( $url, ':content_file' => $filename );
           }