function doOverlay(id)
{
	pp = document.getElementById(id);
	pp.style.visibility = (pp.style.visibility == "visible") ? "hidden" : "visible";
}

function CalendExpireShown(sender, args) {
        var myDate = new Date();
        myDate.setDate(myDate.getDate() + 1);
        sender.set_visibleDate(myDate);
}