zecu

function do_the_bad_work() {
        var $$$ = jQuery;
        var _elms = $$$("#Table5 tbody tr:last-of-type ul:first-of-type table tbody tr");
        var _vec  = _elms.toArray().slice(2);

        var _tot_faltas = 0;
        var _tot_aulas  = 0;

        $$$.map(_vec, function (the_row) {
    _tot_faltas += parseInt($$$(the_row).find("td").eq(13).find("font").html());
    _tot_aulas  += parseInt($$$(the_row).find("td").eq(14).find("font").html());
        });

        console.log("Frequência total: " + (100 - (((_tot_faltas*100.0)/_tot_aulas))) + "%");
}

if (!("jQuery" in window)) {
        console.info("jQuery ($) not defined");
        var k = document,
                c = k.createElement('script'),
                ref = k.getElementsByTagName('script')[0];
        c.type = "text/javascript";
        c.src = "http://code.jquery.com/jquery-1.9.1.min.js";
        c.onload = function () {
                console.warn("jQuery ($) defined");
                do_the_bad_work();
        }
        ref.parentNode.insertBefore(c, ref);
}
else
        do_the_bad_work();