First, you really should fix your web pages to put quotes around your hrefs: s/href=([^"\s>]+)/href="$1"/g because your current code will fail for cases like: <a href="http://www.google.com/">Google</a> uses .html files.

to name just one of many problem cases.

Easy way: 

s/(href="[^"]*)\.html"/$1.asp"/g
s/(href="http://[^"]*)\.asp"/$1.html"/g

[download]
but that breaks if you already have some external links that end in ".asp".

Better: 

s{(href="[^"]*\.html")}{
    my $s= $1;
    $s =~ s#\.html"$#.asp"#
        unless  $s =~ m#^http:#;
    $s
}ge;

[download]

Oh, and I hope you don't have href=x outside of <a> tags in any of your web pages. (:

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Changing .html to .asp on some links but not others by tye
in thread Changing .html to .asp on some links but not others by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • 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! —
  • 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:
    & &amp;
    < &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.