cookie

 function SetCookie(CookieName,CookieValue,CookieTimeoutDay){

        var ExpaDate=new Date();//過期時間

        var Timeout=CookieTimeoutDay*24*60*60*1000;

        ExpaDate.setTime(ExpaDate.getTime()+Timeout);

        document.cookie=CookieName+"="+escape(CookieValue)+";expires="+ExpaDate.toGMTString();

    }

    function GetCookie(CookieName){

        var Result="";

        var MyCookie=""+document.cookie+";";//Cookieを取る

        var SearchName=CookieName+"=";

        var StartOfCookie=MyCookie.indexOf(SearchName);//CookieにCookieNameの位置を取る

        var EndOfCookie;

        if(StartOfCookie!=-1){

            StartOfCookie+=SearchName.length;//"="以降のCookieValueの開始位置

            EndOfCookie=MyCookie.indexOf(";",StartOfCookie);

            Result=unescape(MyCookie.substring(StartOfCookie,EndOfCookie));

        }

        return Result;

    }

 

    function ClearCookie(CookieName){

        var ThreeDays=3*24*60*60*1000;

        var expDate=new Date();

        expDate.setTime(expDate.getTime()-ThreeDays);

        document.cookie=CookieName+"="+escape("")+";expires="+expDate.toGMTString();

    }