package MySample;
sub build_dropdown
{
	# 	build_dropdown(  \$DataObject , 'key_function', 'text_function', 'Select A Header', 'preselectedValue' );
	my @xml;
	if ( $_[3] )
	{
		push @xml , qq{<option value="">$_[3]</option>};
		push @xml , qq{<option value="">==========</option>};
	}
	foreach my $id ( $_[0]->{$_[1]}() )
	{
		my 		$sel = ( $id == $_[4] ) ? ' selected' : '';
		push 	@xml , ("<option value=\"$id\"${sel}>" . $_[0]->{$_[2]}($id) . '</option>');
	}
	return join "\n" , @xml;
}

##</code><code>##

package myBox;

sub new 
{
	my  $proto 				= $_[0];
	my  $class 				= ref($proto) || $proto;
	my  $self  				= bless ( {} , $class );
		$self->{'__keys'} 	= { '1' => 'a', '2' => 'b', '3' => 'c', '4' => 'd', '5' => 'e' };
	return $self;
}
sub get__keys
{
	return keys %{ $_[0]->{'__keys'} };
}

sub get__textforkey
{
	return $_[0]->{'__keys'}{$_[1]} ;
}
1;

##</code><code>##

my 		$box = myBox->new();
print 	&HtmlDropDowns::build_dropdown( $box , 'get__keys' , 'get__textforkey' , 'select a header' , 2 );