jQuery(window).load(function () {
	var cookie = getCookie("size");
	if (cookie) changeFontSize(cookie);
});

// フォントサイズの変更
function changeFontSize(size) {
	if (size == "s") {
		jQuery("body").css("font-size", "70%");
	} else if (size == "m") {
		jQuery("body").css("font-size", "80%");
	} else if (size == "l") {
		jQuery("body").css("font-size", "90%");
	}
	setCookie("size",size,365);
}

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

function getCookie(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;
}