function getLoginUrl(){
    var loginUrl = "http://app.91ophone.com/login.jsp";
    var current_url=window.location.href;
    if(current_url.indexOf(loginUrl)!=-1){
        current_url = "http://www.91ophone.com/";
    }
    return loginUrl + "?last_url=" + encodeURIComponent(current_url);
}

document.write('<a href="'+getLoginUrl()+'">[请登录]</a><a href="http://app.91ophone.com/mservices/reg/SSLRegister.action">[马上注册]</a>');