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()) + ';path=/'
}


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 ""
}