I'm not sure about exactly how you want to format your logfile entries in HTML...

That being said, I think you should be looking at File::Tail as a useful way of tailing an access log..

or, the following: its ugly,(and I don't recommend it) but it will work

while (1) {
    while (<INPUT>) { .... }
    sleep $delay_period;
    seek(INPUT, 0, 1);
}
[download]

To format into HTML, well, assuming you just want to make it appear readable, so what you can do is add a <br> to the end of each line.. so, use CGI.pm to complete the picture, using the following snippet..

#!/usr/bin/perl -w

use CGI; 
use strict;

my $query = new CGI; 

print $query->header(), 
   $query->start_html(-title=>"My log file"), 
   $query->h1('Tail');
# put your tailing method here
while (1) {
    while (my $input = <INPUT>) {join('',$input,'<br/>'); print $input
+;}
    sleep $delay_period;
    seek(INPUT, 0, 1);
}
print $query->end_html();
[download]