// Click delegation (cross browser API's not accounted for)
document.addEventListener('click', function (e) {
    if (e.target.tagName.toLowerCase() === 'a' && e.target.href) {
        /* execute tracking logic */
    }
}, false);


// Click delegation with YUI 3
Y.one('doc').delegate("click", function (e) {
    /* execute tracking logic */
}, "a[href]");