Okay, I went to that and I now know how to set a timeout. The question is now, how do I check for it? Rather than just timing out and moving on, I need to print a message stating it skipped it to browser.

use CGI qw/:standard/;

use LWP::Simple qw(!head $ua);
use LWP::UserAgent;
  use HTML::LinkExtor;
  use URI::URL;

  my $ua = LWP::UserAgent->new;
  $ua->timeout(10);
  my $p = HTML::LinkExtor->new;

  my $res = $ua->request(HTTP::Request->new(GET => $url),
                      sub {$p->parse($_[0])});

#### INSERT TIMEOUT CHECK HERE
if (timeout) { print "This url timed out"; }

 if ($res->status_line =~ /NOT FOUND/i)
{ print "NOT FOUND!"; }
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