var calendarAreaClass = function(){

	//ブラウザ判定
	var isWin9X = (navigator.appVersion.toLowerCase().indexOf('windows 98')+1); 
	var isIE = (navigator.appName.toLowerCase().indexOf('internet explorer')+1?1:0); 
	var isOpera = (navigator.userAgent.toLowerCase().indexOf('opera')+1?1:0); 
	var isSafari = (navigator.appVersion.toLowerCase().indexOf('safari')+1?1:0);
	var isFirefox = (navigator.userAgent.toLowerCase().indexOf('firefox')+1?1:0);
	var isKonqueror = (navigator.userAgent.toLowerCase().indexOf('Konqueror')+1?1:0);
	if (isOpera) isIE = false; 
	
	var getUrl = "";	//カレンダーリクエスト送信先
	var thisYear = false;	//年オブジェクト
	var thisMonth = false;	//月オブジェクト
	var thisDay = false;	//日オブジェクト
	var thisNumber = false; //カレンダー番号
	var thisStartdate = "";
	
	var thisBtn = false;	//カレンダー呼び出しボタン
	var thisArea = false;	//カレンダー表示親エリア
	var thisBody = false;	//カレンダー表示エリア
	var thisBack = false;	//カレンダー表示エリア背景(透過防止のiframe)
	var thisText = false;	//カレンダー選択中の日付エリア
	
	var response = "";
	
	//初期設定
	this.init = function (url,number,startdate){

		getUrl = url;
		thisNumber = number;

		thisYear = document.getElementById("year"+thisNumber);
		thisMonth = document.getElementById("month"+thisNumber);
		thisDay = document.getElementById("day"+thisNumber);
		thisArea = document.getElementById("calendarArea"+thisNumber);
		thisStartdate = startdate;

		if(thisArea){
			//カレンダー表示エリア設定
			thisArea.innerHTML = '<div id="calendarAreaBody'+thisNumber+'"></div>';
			thisBody = document.getElementById("calendarAreaBody"+thisNumber);
			thisText = document.getElementById("date"+thisNumber);
			calendarShow("",true);
		}else{
			return false;
		}
	}
	
	//カレンダー呼び出し(リクエスト送信)
	function calendarShow(dateText,show){

		var year = null;
		var month = null;
		var day = null;

		var allElements = document.getElementsByTagName("*");

		if(dateText.indexOf("-") > -1){
			var dates = dateText.split("-");
			year = dates[0];
			month = dates[1];
			day = dates[2];
		}else{
			year = thisYear.value;
			month = thisMonth.value;
			day = thisDay.value;
		}
		
		var sendparam = "&start_date=" + thisStartdate + "&elm_no=" + thisNumber + "&year=" + year + "&month=" + month + "&day=" + day + '&select=' + thisYear.value + '-' + thisMonth.value + '-' + thisDay.value;

		//リクエスト送信
		getResponsebody(setResponse,sendparam,'POST',getUrl,false,"calendarAreaBody");
	}
	
	//カレンダー呼び出し(カレンダー情報受信)
	function setResponse(res,id){

		response = res.responseText;
		if(response.length > 0){
			thisBody.innerHTML = response;
			//選択可能日のAタグ
			var enableBtn = document.getElementsByName("calendar_enable"+thisNumber);
			for(var i = 0;i < enableBtn.length;i++){
				enableBtn[i].onclick = function(){setCalendarDate(this.className,this.title)};
			}
			if(document.getElementById("calendar_prev"+thisNumber)){
				document.getElementById("calendar_prev"+thisNumber).onclick = function(){calendarShow(this.className,true)};
			}
			if(document.getElementById("calendar_today"+thisNumber)){
				document.getElementById("calendar_today"+thisNumber).onclick = function(){calendarShow(this.className,true)};
			}
			if(document.getElementById("calendar_next"+thisNumber)){
				document.getElementById("calendar_next"+thisNumber).onclick = function(){calendarShow(this.className,true)};
			}

		}
	}
	
	//日付代入
	function setCalendarDate(dateText,dateTitle){
		if(dateText.indexOf("-") > -1){
			var dates = dateText.split("-");
			var dates_title = dateTitle.split("-");
		}else{
			return false;
		}

		var before_date = document.getElementById(thisYear.value + '-' + thisMonth.value + '-' + thisDay.value+'-'+thisNumber);
		var after_date = document.getElementById(dateText+'-'+thisNumber);

		if(before_date && before_date.getAttribute('class_bk')){
			before_date.className = before_date.getAttribute('class_bk');
		}
		
		after_date.setAttribute('class_bk',after_date.className);
		after_date.className = 'calendar_area_td_selected';
		
		thisYear.value = dates[0];
		thisMonth.value = dates[1];
		thisDay.value = dates[2];
		
		thisYear.title = dates_title[0];
		thisMonth.title = dates_title[1];
		thisDay.title = dates_title[2];
		
		thisText.innerHTML = dates[0]+'年'+dates[1]+'月'+dates[2]+'日';
		
	}
	
	//カレンダーを閉じる
	function calendarHide(){
		thisArea.style.display = "none";
	}

	function getResponsebody(callback,data,method,fileURL,async ,id){
		var oj =  null;

		//XMLHttpRequestオブジェクト生成
		if(window.ActiveXObject){
			try{
				oj = new ActiveXObject("Msxml2.XMLHTTP");
			} 
			catch (e){
				try{
					oj = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch (e2){
					oj = null;
				}
			 }
		}else if(window.XMLHttpRequest){
			oj = new XMLHttpRequest();
		}else{
			oj = null;
		}
		if( oj == null ){
			return null;
		}

		//Konquerorはonloadが不安定
		if(isOpera || isSafari || isFirefox){
			oj.onload = function () { callback(oj,id) }
		}else{
			oj.onreadystatechange = function () {
				if (oj.readyState == 4){
					callback(oj,id);
				}
			}
		}

		if(isFirefox){
			oj.overrideMimeType("text/plain; charset=shift_jis");
		}


		oj.open( method,fileURL,async);
		
		if(method == 'POST'){
			if(!isOpera){
				oj.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			}
		}

		oj.send(data);
	}

}