// JavaScript Document

// フォントサイズ

function changeFontSize(size) {

    var fontSizeSet = ['80%','100%','120%'];

    if ( size == 'N' ){

        if ( size = getCookie('fontsize') ){

            if ( isNaN(size) ){

                size = 1;

            }

        }else{

            size = 1;

        }

    }else{

        setCookie('fontsize',size);

    }

    document.getElementById('contents').style.fontSize = fontSizeSet[size];

    if ( size == 0 ){

        document.getElementById('fontS').className = "fontS-select";

        document.getElementById('fontM').className = null;

        document.getElementById('fontL').className = null;

    }else if ( size == 1 ){

        document.getElementById('fontS').className = null;

        document.getElementById('fontM').className = "fontM-select";

        document.getElementById('fontL').className = null;

    }else if ( size == 2 ){

        document.getElementById('fontS').className = null;

        document.getElementById('fontM').className = null;

        document.getElementById('fontL').className = "fontL-select";

    }

}



function setCookie(Data,Value){

    life = new Date();

    life.setTime(life.getTime() + 24*60*60*1000*30);

    document.cookie = Data + "=" + escape(Value) + "; path=/; expires=" + life.toGMTString();



}



function getCookie(Data){

    var cookieArray = document.cookie.split("; ");

    for ( i=0; i<cookieArray.length; i++ ){

        var aCrumb = cookieArray[i].split("=");

        if ( Data == aCrumb[0] ){

            return unescape(aCrumb[1]);

        }

    }

    return null;

}