window.onload = function(){
	btnL = document.getElementById('btn_large');
	btnM = document.getElementById('btn_middle');
	btnS = document.getElementById('btn_small');

	btnM.style.visibility = 'hidden';
	btnS.style.visibility = btnL.style.visibility = 'visible';

	//クッキーを読み込む
	var value = $.cookie('fsize');
	
	if(value){
		$('body').css('font-size',value);
		if(value=='16px'){
			btnL.style.visibility = 'hidden';
			btnS.style.visibility = btnM.style.visibility = 'visible';
		}
		if(value=='12px'){
			btnS.style.visibility = 'hidden';
			btnM.style.visibility = btnL.style.visibility = 'visible';
		}
	}else{
		$('body').css('font-size','14px');
		btnM.style.visibility = 'hidden';
		btnS.style.visibility = btnL.style.visibility = 'visible';
	}
}

function large() {
//		document.body.style.fontSize = "16px"; 
	btnL.style.visibility = 'hidden';
	btnM.style.visibility = btnS.style.visibility = 'visible';
		$('body').css('font-size','16px');
		$.cookie("fsize",'16px', {expires: 365, path: '/'});
		return false;
}
function middle() {
//		document.body.style.fontSize = "14px"; 
	btnM.style.visibility = 'hidden';
	btnS.style.visibility = btnL.style.visibility = 'visible';
		$('body').css('font-size','14px');
		$.cookie("fsize",'14px', {expires: 365, path: '/'});
		return false;
}
function small() {
//		document.body.style.fontSize = "12px"; 
	btnS.style.visibility = 'hidden';
	btnM.style.visibility = btnL.style.visibility = 'visible';
		$('body').css('font-size','12px');　//bodyのfont-sizeを変更。
		$.cookie("fsize",'12px', {expires: 365, path: '/'}); //cookieに「fsize=12px」として保存
		return false;
}

/*$(function(){
	$('#btn_small').click(function(){
		$('body').css('font-size','12px');　//bodyのfont-sizeを変更。
		$.cookie("fsize",'12px', {expires: 365, path: '/'}); //cookieに「fsize=12px」として保存
		return false;
	});
	$('#btn_middle').click(function(){
		$('body').css('font-size','14px');
		$.cookie("fsize",'14px', {expires: 365, path: '/'});
		return false;
	});
	$('#btn_large').click(function(){
		$('body').css('font-size','16px');
		$.cookie("fsize",'16px', {expires: 365, path: '/'});
		return false;
	});
});

*/