var dom = new Object();
dom.event = new Object();
dom.event.addEventListener = function(elm, type, func, useCapture) {
	if(! elm) { return false; }
	if(! useCapture) {
		useCapture = false;
	}
	if(elm.addEventListener) {
		elm.addEventListener(type, func, false);
	} else if(elm.attachEvent) {
		elm.attachEvent('on'+type, func);
	} else {
		return false;
	}
	return true;
};
var buttonId = ["normal", "large", "exlarge"];
var linkTagIndex = 2;
var cookiePath = "/mayor/";
dom.event.addEventListener(window, "load", init);
function init() {
	if (document.getElementById) {
		for (i = 0; i < buttonId.length; i++) {
			if (element = document.getElementById("fontsize-" + buttonId[i])) {
				dom.event.addEventListener(element, "click", changeFontSize);
			}
		}
	}
	getCookie();
}
function changeFontSize(event) {
	var element;
	if (event.target) {
		element = event.target;
	} else if (event.srcElement) {
		element = event.srcElement;
	}
	if (element.nodeType == 3) element = element.parentNode;
	switchStyleSheet(element.id.split("-")[1]);
}
function switchStyleSheet(styleId) {
	if (document.getElementsByTagName) {
		var linkTag = document.getElementsByTagName("link").item(linkTagIndex);
		var pathData = linkTag.href.split("/");
		var cssName = pathData[pathData.length - 1];
		var nameData = cssName.substring(0, cssName.length - 4).split("_");
		setClass(nameData[nameData.length - 1], "");
		setClass(styleId, "selected");
		nameData[nameData.length - 1] = styleId;
		pathData[pathData.length - 1] = nameData.join("_") + ".css";
		linkTag.href = pathData.join("/");
		setCookie(styleId);
	}
}
function setClass(id, style) {
	if (document.getElementById) {
		if (element = document.getElementById("fontsize-" + id)) {
			if (style) {
				element.setAttribute("class", style);
				element.setAttribute("className", style);
			} else {
				element.removeAttribute("class");
				element.removeAttribute("className");
			}
		}
	}
}
function setCookie(fontSize) {
	var cookie = "fontsize=" + fontSize + ";";
	cookie += "expires=Fri, 31-Dec-2017 23:59:59 GMT; path=" + cookiePath +";";
	document.cookie = cookie;
}
function getCookie() {
	if (!document.cookie) return false;
	var data = unescape(document.cookie).split(';');
	for (i = 0; i < data.length; i++) {
		if (data[i].indexOf("fontsize=") == 0) {
			switchStyleSheet(data[i].split("=")[1]);
			break;
		}
	}
}