I am a perl newbie, but I inherited a very large perl program, and am learning a lot from it. I added the line: 

use strict;

to take advantage of the additional warnings and errors I get from it. But, now at run time, I am seeing this message (among others)

Use of uninitialized value in pattern match (m//) at secalert_index_verbose.cgi line 180.
.

Now this is the code before and after line 180:

($ENV{HTTP_USER_AGENT} =~ /MSIE/)
&& do {
  # Internet Explorer
  $style{'body','font-size'}='10pt';
  $style{'th','font-size'}='8pt';
  $style{'td','font-size'}='6pt';
  $style{'pre','font-size'}='10pt';
  $titlebox_size='4';
  1;
} || do {
  # Netscape
  $style{'body','font-size'}='10pt';
  $style{'th','font-size'}='10pt';
  $style{'td','font-size'}='8pt';
  $style{'pre','font-size'}='10pt';
  $titlebox_size='5';
};

Line 180 is actually the line that reads:

} || do {

What's it talking about, and how do I fix it? I can't find the string 'm//' anywhere in my code.

In reply to Unknown warnings/errors by kmullin5016

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