(function(global) {

    var nowline = document.getElementById('nowline');

    setInterval(function() {
        var items = document.querySelectorAll('td.v3dayCell:last-child div.pid-item');

        for (var i = items.length; i--;) {
            var item = items[i];

            var itemTop    = parseFloat(item.style.top);
            var itemBottom = parseFloat(item.style.height) + itemTop;

            var nowlineTop = parseFloat(nowline.style.top);

            if (itemTop <= nowlineTop    &&
                nowlineTop <= itemBottom &&
                !item.alerted) {

                item.alerted = true;

                var title = item.querySelector('a.v3title').textContent;
                alert(title);

                break;

            }
        }
    }, 60000);

}(this));