// This function pops-up the window for the calendar
var addWindow
function subpop(s) {
    addWindow = window.open(s,"cal","width=280,height=210,resizable=0,status=0,menubar=0,scrollbars=0,fullscreen=0");
	addWindow.focus()
}

// Closes calendar window if it exists
function close_calendar() {
    if (addWindow && !addWindow.closed)
	   addWindow.close()
}