<td class="column1">
               
 <input type="submit" name="Button1" value="Hinzufuegen" id="Button1" class="add" />
               
 12345
               
 <br />
               
 <span class="verkauf">
               
     67890
               
 </span>
               
 <br />
               
 
            </td>
        </tr>

#! /usr/bin/perl
use strict;
use warnings;
use HTML::Parser;
use Data::Dumper;

my @numbers;
my $string = qq~Dein HTML~;

my $p = HTML::Parser->new();
$p->{numbers} = [];
$p->handler(start => \&start_handler,"tagname,attr,self");
$p->handler(end => \&end_handler,"self,tagname");
$p->handler(text => \&text_handler, "self,dtext");
$p->parse($string);

print Dumper(\@numbers)

sub start_handler{
   my ($tag,$attr,$self) = @_;
   return if($tag ne 'input');
   return unless($attr->{name} =~ /^Button\d+$/);
   $self->{bool} = 1;
}

sub end_handler{
    my ($self,$tag) = @_;
    if($tag eq 'td'){
        $self->{bool} = 0;
        push @numbers,$self->{numbers} if(scalar @{$self->{numbers}} > 0);
        $self->{numbers} = [];
    }
}

sub text_handler{
    my ($self,$text) = @_;
    $text =~ s/^\s+//;
    $text =~ s/\s+$//;
    if($self->{bool} and $text =~ /^\d+$/){
        push @{$self->{numbers}},$text;
    }
}