function setupCalendarEvent() {
    $(function() {
        $('.date_has_event').each(function() {
            // options
            var distance = 10;
            var time = 250;
            var hideDelay = 500;

            var hideDelayTimer = null;

            // tracker
            var beingShown = false;
            var shown = false;

            var trigger = $(this);
            var popup = $('.events ul', this).css('opacity', 0);

            // set the mouseover and mouseout on both element
            $([trigger.get(0), popup.get(0)]).mouseover(function() {
                // stops the hide event if we move from the trigger to the popup element
                if (hideDelayTimer) clearTimeout(hideDelayTimer);

                // don't trigger the animation again if we're being shown, or already visible
                if (beingShown || shown) {
                    return;
                } else {
                    beingShown = true;

                    // reset position of popup box
                    popup.css({
                        bottom: 50,
                        left: -40,
                        display: 'block' // brings the popup back in to view
                    })

                    // (we're using chaining on the popup) now animate it's opacity and position
				.animate({
				    bottom: '+=' + distance + 'px',
				    opacity: 1
				}, time, 'swing', function() {
				    // once the animation is complete, set the tracker variables
				    beingShown = false;
				    shown = true;
				});
                }
            }).mouseout(function() {
                // reset the timer if we get fired again - avoids double animations
                if (hideDelayTimer) clearTimeout(hideDelayTimer);

                // store the timer so that it can be cleared in the mouseover if required
                hideDelayTimer = setTimeout(function() {
                    hideDelayTimer = null;
                    popup.animate({
                        bottom: '-=' + distance + 'px',
                        opacity: 0
                    }, time, 'swing', function() {
                        // once the animate is complete, set the tracker variables
                        shown = false;
                        // hide the popup entirely after the effect (opacity alone doesn't do the job)
                        popup.css('display', 'none');
                    });
                }, hideDelay);
            });
        });
    });
}

setupCalendarEvent();