function popupCalendar(scroll,width,height,Id,nicedatetime)
{
	var a;
	a = width / 2;
	var b;
	b = height / 2;	
	var LeftPosition = (screen.width/2) - a;
	var TopPosition = (screen.height/2) - b;
	
	window.open("/CalendarPopup.aspx?nicedatetime=" + nicedatetime + "&Id=" + Id, "", "width="+width+",height="+height+",resizable=yes,toolbar=no,header=no,location=no,"+"left="+LeftPosition +",top="+TopPosition+",scrollbars="+scroll);
}