ABBR

Abbr is a JavaScript library / function for finding, highlighting and annotating abbreviations in text.

It needs no extra markup, all is done automatically. Just tell it what words you want to explain, and it'll do it.

Abbr takes the following arguments:

var opts = {
    // selector in which to search for abbreviations
    where: 'body',
    // abbreviation list - word: explanation
    words: {},
    // Tag used to mark the matches
    tag: 'abbr',
    // Attribute holding the "description" to be added to the tag
    attr: 'title',
    // Case insensitive
    ci: true,
    // tags that shall not be traversed (in addition to opts.tag)
    excluded: ['script', 'style', 'code', 'head', 'textarea', 'embed'],
    // Extra excluded (doesn't overwrite the original list)
    exclude: []
};

All config options are optional (though, obviously, you don't want to leave words empty).

To run it, simply call:

abbr({
    // Your options here
});

For example:

abbr({
    where: 'article',
    words: {
        'NSA': 'National Spying Agency',
        'Putin': 'Bear rider'
    }
});