// フォントサイズ変更
$(function(){
  var currentstyle = readCookie('fontStyle');
  if (currentstyle){
  	switchFont(currentstyle);
  };
  $("a.sizeL").click(function(){
  switchFont("fontL");
  return false;
  });
  $("a.sizeM").click(function(){
  switchFont("fontM");
  return false;
  });
  $("a.sizeS").click(function(){
  switchFont("fontS");
  return false;
  });
});
function switchFont(className){
	$("body").removeAttr("class").addClass(className);
	createCookie('fontStyle', className, 365);
};

// cookie script http://www.quirksmode.org/js/cookies.html
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 var 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;
}