Just one remark: I think you better use the CSS class rather than the id, because refs to one node can occur more than one time, and the ID attribute is supposed to be unique within one document (at least for well formed (x)html). This is also what adrianh suggested in his post.

Also, I'm not completely sure about CSS classes consisting of only numbers being legal, so we have: 

...posted by <a href="...?node_id=186362"
class="id186362">adrianh</a>...

[download]
And in your stylesheet: 
.id186362 { background-color: orange; }

[download]
As for this idea being expensive at execution time, I hardly doubt so, as the node_id value should be known at page render time anyway for the href attribute; printing the same variable a second time should be rather trivial IMHO.

--
Cheers, Joe

In reply to Re: Use node # as CSS class names? by joe++
in thread Use node # as CSS class names? by adrianh

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.