var yomotsuSwitchFontSize = {

	conf : {
		fontSize    : ["16px","14px","12px"],
		switchId    : ["switchFontSizeBig", "switchFontSizeMedium", "switchFontSizeSmall"],
		defoSizeId  : "switchFontSizeMedium",
		targetAreaId: "pageContent",    //フォントサイズを適用するエリアのID
		cookieName  : "yomotsuFontSize",      //クッキーの名前
		cookieLimit : 30,                     //有効期限(日にち)
		switchWriteArea : "fsArea",          //指定したIDのエリアの一番最後にスイッチのHTMLが書き込まれる
		switchHTML      : '\n	<ul id="fontSize">\n	<li id="ttl"><img src="/wmlife/_src/img/ttl_fontsize.jpg" alt="文字の大きさ" width="75" height="16" /></li>\n	<li id="switchFontSizeSmall">小</li>\n	<li id="switchFontSizeMedium">中</li>\n	<li id="switchFontSizeBig">大</li>\n</ul>\n<!--/#fontsizeControl-->'

// switchHTMLの参考用デフォルト値
//
//  <ul>
//  <li id="switchFontSizeBig">大</li>
//  <li id="switchFontSizeMedium">中</li>
//  <li id="switchFontSizeSmall">小</li>
//  </ul>

	},

	main : function(){
		yomotsuSwitchFontSize.setHTML();
		yomotsuSwitchFontSize.defo();
		var i, j, switchItem = yomotsuSwitchFontSize.conf.switchId;

		for(i=0;i<switchItem.length;i++){
			document.getElementById(switchItem[i]).onclick = yomotsuSwitchFontSize.action;
		}
	},

	setHTML : function(){
		var fontsizeSwitch = document.createElement('div');
		fontsizeSwitch.id  = "fontsizeControl";
		fontsizeSwitch.innerHTML = yomotsuSwitchFontSize.conf.switchHTML;

		document.getElementById(yomotsuSwitchFontSize.conf.switchWriteArea).appendChild(fontsizeSwitch);
	},

	defo : function(){
		var i;
		var switchId = yomotsuSwitchFontSize.conf.switchId;
		var targetAreaId = yomotsuSwitchFontSize.conf.targetAreaId;
		var fontSize = yomotsuSwitchFontSize.conf.fontSize;

		cookieValue = this.getCookie() || yomotsuSwitchFontSize.conf.defoSizeId;
		for(i = 0; i < switchId.length; i++){
			if(cookieValue == switchId[i]){
				document.getElementById(targetAreaId).style.fontSize = fontSize[i];
			}
		}
		document.getElementById(cookieValue).className ="active";
	},

	action : function(){
		var i;
		var switchId = yomotsuSwitchFontSize.conf.switchId;
		var targetAreaId = yomotsuSwitchFontSize.conf.targetAreaId
		var fontSize = yomotsuSwitchFontSize.conf.fontSize

		for(i=0;i<switchId.length;i++){
			var switchItem = document.getElementById(switchId[i]);
			switchItem.className="";
			if(this.id == switchId[i]){
				document.getElementById(targetAreaId).style.fontSize = fontSize[i];
			}
		}
		this.className ="active";

		yomotsuSwitchFontSize.setCookie(this.id);
	},

	setCookie: function(data) {
		var today = new Date();
		today.setTime(today.getTime() + (1000 * 60 * 60 * 24 * Number(this.conf.cookieLimit)));
		document.cookie = this.conf.cookieName + '=' + encodeURIComponent(data) + '; path=/; expires=' + today.toGMTString();
	},

	getCookie: function(m) {
		return (m = ('; ' + document.cookie + ';').match('; ' + this.conf.cookieName + '=(.*?);')) ? decodeURIComponent(m[1]) : null;
	},

	addEvent : function(){
		if(window.addEventListener) {
			window.addEventListener("load", this.main, false);
		}
		else if(window.attachEvent) {
			window.attachEvent("onload", this.main);
		}
	}

}

yomotsuSwitchFontSize.addEvent();