#!/usr/bin/perl -w
use HTML::Scrubber;
use strict;

my $html = q[
<style type="text/css"> BAD { background: #666; color: #666;} </style>
<script language="javascript"> alert("Hello, I am EVIL!");
</script>
<HR>
    a   => <a href=1>link </a>
    br  => <br>
    b   => <B> bold </B>
    u   => <U> UNDERLINE </U>
];

my $scrubber = HTML::Scrubber->new( allow => [ qw[ p b i u hr br ] ] );
print $scrubber->scrub($html);

$scrubber->deny( qw[ p b i u hr br ] );
print $scrubber->scrub($html);
__END__
Output:
<hr>
    a   =&gt; link
    br  =&gt; <br>
    b   =&gt; <b> bold </b>
    u   =&gt; <u> UNDERLINE </u>

    a   =&gt; link
    br  =&gt;
    b   =&gt;  bold
    u   =&gt;  UNDERLINE