// style
function setActiveStyleSheet(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") == "font_small") {
				MM_swapImage('head_size_small', '',
						imgPath + '/common/head_logo/small.png', 1);
			} else if (a.getAttribute("title") == "font_medium") {
				MM_swapImage('head_size_medium', '',
						imgPath + '/common/head_logo/medium.png', 1);
			} else if (a.getAttribute("title") == "font_large") {
				MM_swapImage('head_size_large', '',
						imgPath + '/common/head_logo/large.png', 1);
			}

			if (a.getAttribute("title") == title) {
				a.disabled = false;
				if (title == "font_small") {
					MM_swapImage('head_size_small', '',
							imgPath + '/common/head_logo/small_on.png', 1);
				} else if (title == "font_medium") {
					MM_swapImage('head_size_medium', '',
							imgPath + '/common/head_logo/medium_on.png', 1);
				} else if (title == "font_large") {
					MM_swapImage('head_size_large', '',
							imgPath + '/common/head_logo/large_on.png', 1);
				}
			}
		}
	}
}

function getActiveStyleSheet() {
	var i, a;
	for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1
				&& a.getAttribute("title") && !a.disabled)
			return a.getAttribute("title");
	}
	return null;
}

function getPreferredStyleSheet() {
	var i, a;
	for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
		if (a.getAttribute("rel").indexOf("style") != -1
				&& a.getAttribute("rel").indexOf("alt") == -1
				&& a.getAttribute("title"))
			return a.getAttribute("title");
	}
	return null;
}

function createCookie(name, value, days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = "; expires=" + date.toGMTString();
	} else
		expires = "";
	document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for ( var i = 0; i < ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0) == ' ')
			c = c.substring(1, c.length);
		if (c.indexOf(nameEQ) == 0)
			return c.substring(nameEQ.length, c.length);
	}
	return null;
}

function styleSwitchInit() {
	//window.onload = function(e) {
	var cookie = readCookie("style");
	var title = cookie ? cookie : getPreferredStyleSheet();
	setActiveStyleSheet(title);
}

window.onunload = function(e) {
	var title = getActiveStyleSheet();
	createCookie("style", title, 365);
}