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                            屬性：

 responseText: 以字符串形式接收服務器端返回的信息

 readyState:ajax對象狀態

 0: 創建ajax對象

 1: 有調用open方法

 2: 有調用send方法

 3: 只返回一部分數據

 4: 數據返回完整

 onreadystatechange:

 是ajax的"事件"，在readyState狀態發生變化的時候被觸發

 為了感知最多的狀態信息，要設置在對象創建完畢之后

 最多可以感知"1/2/3/4"標志狀態信息

 方法：

 open()創建新的http協議(請求方式、地址)

 send()發送請求(post請求數據)

![Image](https://box.kancloud.cn/a2424ee8283fc870111f7c7188256d81_591x249.png)

![Image](https://box.kancloud.cn/7bea5b3945ef62546f7973fb91f1a9be_507x149.png)


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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