This is a method for rendering Greek and Latin verse on the web, designed from the perspective of progressive enhancement using semantic HTML and employing CSS and optional jQuery for presentation.
If, for any reason, either JavaScript or CSS doesn't load, the presentation of the poetry will degrade gracefully to reveal the semantic markup, which retains proper line numbering.
There hasn't been a standard for citing classical verse on the web in a way that is (1) semantic and (2) aesthetic (i.e., aligned with print conventions). People often copy and paste snippets of poetry within ablockquote element when citing smaller pieces or painstakingly creating tables with manual line numbers when displaying larger works. Like the makers of every infomercial, I believe there has to be a better way.