var oldLink = null;
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.
	//if (cal.dateClicked && (cal.sel.id == "sel1" || cal.sel.id == "sel3"))
	//	cal.callCloseHandler();
	// 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.
	
	//if (cal.dateClicked)
		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.nextSibling, "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 showFlatCalendar(id, holder, format, selectedHandler) {
	var prnt = document.getElementById(holder);
	var element = document.getElementById(id);
	// construct a calendar giving only the "selected" handler.
	var cal = new Calendar(0, null, selectedHandler);
	// hide week numbers
	cal.setDateFormat(format);
	cal.weekNumbers = false;
	cal.create(prnt);
	cal.parseDate(element.value);
	cal.show();
}