第二十二 webchat（2）

        //globe chat record dic
        GLOBAL_CHAT_RECORD_DIC = {
            ‘single‘:{},
            ‘group‘:{},
        }

 //在切换之前把之前的聊天内容归档
            var current_session_id = $(".chat-box-title").attr("contact-id");
            var current_session_type = $(".chat-box-title").attr("contact-type");
            if(current_session_id){
                GLOBAL_CHAT_RECORD_DIC[current_session_type][current_session_id] = $(".chat-box-window").html()
            }

            //获取新内容
            var new_contact_chat_record = GLOBAL_CHAT_RECORD_DIC[contact_type][contact_id];
            //如果是第一次从字典取值
            if(typeof new_contact_chat_record == ‘undefined‘){
                new_contact_chat_record = ‘‘;
            }
            //将内容赋予到对话框
            $(".chat-box-window").html(new_contact_chat_record)