var oldLink = null;
			// code to change the active stylesheet
			function setActiveStyleSheet(link, title) {
			var i, a, main;
			for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
				if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
				a.disabled = true;
				if(a.getAttribute("title") == title) a.disabled = false;
				}
			}
			if (oldLink) oldLink.style.fontWeight = 'normal';
			oldLink = link;
			link.style.fontWeight = 'bold';
			return false;
			}

			// This function gets called when the end-user clicks on some date.
			function selected(cal, date) {
			cal.sel.value = date; // just update the date in the input field.
			//for nights calc
			if((cal.sel.id == "ctl00_ContentPlaceHolder1_txtArrive")||(cal.sel.id == "ctl00_ContentPlaceHolder1_txtDepart"))
			{			    
			    SetDate(cal.sel,date);
			}
			//end nights
			if (cal.dateClicked && (cal.sel.id == "sel1" || cal.sel.id == "sel3"))
				// if we add this call we close the calendar on single-click.
				// just to exemplify both cases, we are using this only for the 1st
				// and the 3rd field, while 2nd and 4th will still require double-click.
				cal.callCloseHandler();
			}

			// And this gets called when the end-user clicks on the _selected_ date,
			// or clicks on the "Close" button.  It just hides the calendar without
			// destroying it.
			function closeHandler(cal) {
			cal.hide();                        // hide the calendar
			//  cal.destroy();
			_dynarch_popupCalendar = null;
			}

			// This function shows the calendar under the element having the given id.
			// It takes care of catching "mousedown" signals on document and hiding the
			// calendar if the click was outside.
function showCalendar(id, format, showsTime, showsOtherMonths) {
			
			var el = document.getElementById(id);
			if (_dynarch_popupCalendar != null) {
				// we already have some calendar created
				_dynarch_popupCalendar.hide();                 // so we hide it first.
			} else {
				// first-time call, create the calendar.
				var cal = new Calendar(1, null, selected, closeHandler);
				// uncomment the following line to hide the week numbers
				// cal.weekNumbers = false;
				if (typeof showsTime == "string") {
				cal.showsTime = true;
				cal.time24 = (showsTime == "24");
				}
				if (showsOtherMonths) {
				cal.showsOtherMonths = true;
				}
				_dynarch_popupCalendar = cal;                  // remember it in the global var
				cal.setRange(1900, 2070);        // min/max year allowed.
				cal.create();
			}
			_dynarch_popupCalendar.setDateFormat(format);    // set the specified date format
			_dynarch_popupCalendar.parseDate(el.value);      // try to parse the text in field
			_dynarch_popupCalendar.sel = el;                 // inform it what input field we use

			// the reference element that we pass to showAtElement is the button that
			// triggers the calendar.  In this example we align the calendar bottom-right
			// to the button.
			_dynarch_popupCalendar.showAtElement(el, "Br");        // show the calendar

		    
			return false;
			}

			var MINUTE = 60 * 1000;
			var HOUR = 60 * MINUTE;
			var DAY = 24 * HOUR;
			var WEEK = 7 * DAY;

			// If this handler returns true then the "date" given as
			// parameter will be disabled.  In this example we enable
			// only days within a range of 10 days from the current
			// date.
			// You can use the functions date.getFullYear() -- returns the year
			// as 4 digit number, date.getMonth() -- returns the month as 0..11,
			// and date.getDate() -- returns the date of the month as 1..31, to
			// make heavy calculations here.  However, beware that this function
			// should be very fast, as it is called for each day in a month when
			// the calendar is (re)constructed.
			function isDisabled(date) {
			var today = new Date();
			return (Math.abs(date.getTime() - today.getTime()) / DAY) > 10;
			}

			function flatSelected(cal, date) {
			var el = document.getElementById("preview");
			el.innerHTML = date;
			}

			function showFlatCalendar() {
			var parent = document.getElementById("display");

			// construct a calendar giving only the "selected" handler.
			var cal = new Calendar(0, null, flatSelected);

			// hide week numbers
			cal.weekNumbers = false;

			// We want some dates to be disabled; see function isDisabled above
			cal.setDisabledHandler(isDisabled);
			cal.setDateFormat("%A, %B %e");

			// this call must be the last as it might use data initialized above; if
			// we specify a parent, as opposite to the "showCalendar" function above,
			// then we create a flat calendar -- not popup.  Hidden, though, but...
			cal.create(parent);

			// ... we can show it here.
			cal.show();
			}
function clearDate(idctrl)
{
    document.getElementById(idctrl).value = "";
}