create close popup listener

[dflow]

i have played around with YUI calendar

i manipulated the code a bit

how do i create a close popup listener ?

// Listener to show the 2 page Calendar when the button is clicked
	YAHOO.util.Event.addListener("show2up", "click", YAHOO.example.calendar.cal1.show, YAHOO.example.calendar.cal1, true);

	YAHOO.example.calendar.cal2 = new YAHOO.widget.Calendar("cal2","cal2Container", { title:"Choose a date:", close:true } );
	YAHOO.example.calendar.cal2.render();