A couple of notes first:

• Indentation would help readability in an enormous way.
• It's not clear why you're calling use vars for some simple globals. You can probably just declare them with my as usual, unless you are using them in other modules, which is a scary thought anyway. Maybe that is where error_page() lives? Try passing this data as arguments, such as error_page("eins","zwei")
• Don't call your subroutines with ampersand, such as &foo, but with brackets, such as foo(). Ampersand is a Perl 4 thing and is slightly dangerous because of how it can work in Perl 5.
• Each time through your @$data loop you are reassigning to $res. Maybe you meant to append, such as $res .= "@$_";
• It's not clear what you expect $_ to be at the end of your program.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.