Calendar.setup = function (params) {
	function param_default(pname, def) { if (typeof params[pname] == "undefined") { params[pname] = def; } };

	param_default("inputField",     null);
	param_default("displayArea",    null);
	param_default("button",         null);
	param_default("eventName",      "click");
	param_default("ifFormat",       "%d/%m/%Y");
	param_default("daFormat",       "%d/%m/%Y");
	param_default("singleClick",    true);
	param_default("disableFunc",    null);
	param_default("dateStatusFunc", params["disableFunc"]);	// takes precedence if both are defined
	param_default("mondayFirst",    true);
	param_default("align",          "Bl");
	param_default("range",          [1900, 2999]);
	param_default("weekNumbers",    true);
	param_default("flat",           null);
	param_default("flatCallback",   null);
	param_default("onSelect",       null);
	param_default("onClose",        null);
	param_default("onUpdate",       null);
	param_default("date",           null);
	param_default("showsTime",      false);
	param_default("timeFormat",     "24");

	var tmp = ["inputField", "displayArea", "button"];
	for (var i in tmp) {
		if (typeof params[tmp[i]] == "string") {
			params[tmp[i]] = document.getElementById(params[tmp[i]]);
		}
	}
	if (!(params.flat || params.inputField || params.displayArea || params.button)) {
		alert("Calendar.setup:\n  Nothing to setup (no fields found).  Please check your code");
		return false;
	}

	function onSelect(cal) {
		if (cal.params.flat) {
			if (typeof cal.params.flatCallback == "function") {
				cal.params.flatCallback(cal);
			} else {
				alert("No flatCallback given -- doing nothing.");
			}
			return false;
		}
		if (cal.params.inputField) {
			cal.params.inputField.value = cal.date.print(cal.params.ifFormat);
		}
		if (cal.params.displayArea) {
			cal.params.displayArea.innerHTML = cal.date.print(cal.params.daFormat);
		}
		if (cal.params.singleClick && cal.dateClicked) {
			cal.callCloseHandler();
		}
		if (typeof cal.params.onUpdate == "function") {
			cal.params.onUpdate(cal);
		}
	};

	if (params.flat != null) {
		params.flat = document.getElementById(params.flat);
		if (!params.flat) {
			alert("Calendar.setup:\n  Flat specified but can't find parent.");
			return false;
		}
		var cal = new Calendar(params.mondayFirst, params.date, params.onSelect || onSelect);
		cal.showsTime = params.showsTime;
		cal.time24 = (params.timeFormat == "24");
		cal.params = params;
		cal.weekNumbers = params.weekNumbers;
		cal.setRange(params.range[0], params.range[1]);
		cal.setDateStatusHandler(params.dateStatusFunc);
		cal.create(params.flat);
		cal.show();
		return false;
	}

	var triggerEl = params.button || params.displayArea || params.inputField;
	triggerEl["on" + params.eventName] = function() {
		var dateEl = params.inputField || params.displayArea;
		var dateFmt = params.inputField ? params.ifFormat : params.daFormat;
		var mustCreate = false;
		var cal = window.calendar;
		if (!window.calendar) {
			window.calendar = cal = new Calendar(params.mondayFirst,
							     params.date,
							     params.onSelect || onSelect,
							     params.onClose || function(cal) { cal.hide(); });
			cal.showsTime = params.showsTime;
			cal.time24 = (params.timeFormat == "24");
			cal.weekNumbers = params.weekNumbers;
			mustCreate = true;
		} else {
			cal.hide();
		}
		cal.setRange(params.range[0], params.range[1]);
		cal.params = params;
		cal.setDateStatusHandler(params.dateStatusFunc);
		cal.setDateFormat(dateFmt);
		if (mustCreate)
			cal.create();
		cal.parseDate(dateEl.value || dateEl.innerHTML);
		cal.refresh();
		cal.showAtElement(params.displayArea || params.inputField, params.align);
		return false;
	};
};

// eGroupWare translations, are read from the database

// ** I18N

// Calendar EN language
// Author: Mihai Bazon, <mishoo@infoiasi.ro>
// Encoding: any
// Distributed under the same terms as the calendar itself.

// full day names
Calendar._DN = new Array
("Nedela",
 "Pondelok",
 "Utorok",
 "Streda",
 "Štvrtok",
 "Piatok",
 "Sobota",
 "Nedela");

// please note eGW does NOT use the short month-names atm.

// full month names
Calendar._MN = new Array
("Január",
 "Február",
 "Marec",
 "Apríl",
 "Máj",
 "Jún",
 "Júl",
 "August",
 "September",
 "Október",
 "November",
 "December");

// tooltips
Calendar._TT = {};
Calendar._TT["INFO"] = "About the calendar";

Calendar._TT["ABOUT"] =
"DHTML Date/Time Selector\n" +
"(c) dynarch.com 2002-2003\n" + // don't translate this this ;-)
"For latest version visit: http://dynarch.com/mishoo/calendar.epl\n" +
"Distributed under GNU LGPL.  See http://gnu.org/licenses/lgpl.html for details." +
"\n\n" +
"Date selection:\n" +
"- Use the %1, %2 buttons to select year','\xab','\xbb\n" +
"- Use the %1, %2 buttons to select month','" + String.fromCharCode(0x2039) + "','" + String.fromCharCode(0x203a) + "\n" +
"- Hold mouse button on any of the above buttons for faster selection.";
Calendar._TT["ABOUT_TIME"] = "\n\n" +
"Time selection:\n" +
"- Click on any of the time parts to increase it\n" +
"- or Shift-click to decrease it\n" +
"- or click and drag for faster selection.";

Calendar._TT["TOGGLE"] = "Toggle first day of week";
Calendar._TT["PREV_YEAR"] = "Pred. rok (menu)";
Calendar._TT["PREV_MONTH"] = "Pred. mesiac (menu)";
Calendar._TT["GO_TODAY"] = "Dnes";
Calendar._TT["NEXT_MONTH"] = "Ďalší mesiac (menu)";
Calendar._TT["NEXT_YEAR"] = "Ďalsí rok (menu)";
Calendar._TT["SEL_DATE"] = "Vyberte dátum";
Calendar._TT["DRAG_TO_MOVE"] = "Presunúť";
Calendar._TT["PART_TODAY"] = " (dnes)";
Calendar._TT["MON_FIRST"] = "Zobraziť pondelok prvý";
Calendar._TT["SUN_FIRST"] = "Zobraziť nedelu prvú";
Calendar._TT["CLOSE"] = "Zavrieť";
Calendar._TT["TODAY"] = "Dnes";
Calendar._TT["TIME_PART"] = "(Shift-)Click or drag to change value";

// date formats
Calendar._TT["DEF_DATE_FORMAT"] = "%d-%m-%Y";
Calendar._TT["TT_DATE_FORMAT"] = "%e %b %Y, %A";

Calendar._TT["WK"] = "Týždeň";