Using keyboard to open videos (for improved accessibility)

Hi,

I’m trying to make this great plugin a little greater, by improving accessibility to non-mouse users. What I am trying to do is make a video playable by tabbing through to its thumbnail, then pressing enter when the desired thumbnail is focused.

So far I have replaced the various permutations of <div class='play_arrow' ...></div> with:

<a tabindex='0' class='play_arrow' ...><span class='offscreen'>Play $item->title</span></a>

where the CSS class offscreen is:

.offscreen{position: absolute; left: -9999em;}

I also replaced the corresponding mentions of <div> elements in the plugin’s script.js and style.css files with <a> elements.

So far so good … except that when I use the keyboard to tab through the links on the page to reach the video thumbnail, the enter key does not play with focused video. Nothing happens — and no Javascript errors are reported in Chrome’s console.

Does anyone have any insight into why this approach has not been successful?

http://ww.wp.xz.cn/extend/plugins/youtube-sidebar-widget/