function getCookie(c_name)

{

    if (document.cookie.length > 0)

    {

        c_start = document.cookie.indexOf(c_name + "=");

        if (c_start!=-1)

        {

            c_start = c_start + c_name.length + 1;

            c_end = document.cookie.indexOf(";", c_start);

            if (c_end == -1)

            {

                c_end = document.cookie.length;

            }

            return unescape(document.cookie.substring(c_start,c_end))

        }

    }

    return ""

}

function setCookie(c_name,value,expiredays)

{

    var exdate = new Date();

    exdate.setDate(exdate.getDate() + expiredays);

    document.cookie=c_name+ "=" + escape(value) +

    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString());

}