// 文字サイズ変更の設定
function switchFont(className){
   $("body").removeAttr("class").addClass(className);
   createCookie('fontStyle', className, 365);
};

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;
}



// Easingの追加
jQuery.easing.quart = function (x, t, b, c, d) {
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
};



$(function() {
	
	// 文字サイズ変更処理
   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;
  });
	
	// ページ内スムーズスクロール <a href="#***">の場合スクロール処理
	$('a[href*=#].smooth').click(function () {
		if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
			var $target = $(this.hash);
			$target = $target.length && $target || $('[name=' + this.hash.slice(1) +']');
			
			if ($target.length) {
				var targetOffset = $target.offset().top;
				$('html,body').animate({ scrollTop: targetOffset }, 500, 'quart');
			}
			return false;
		}
	});
});