判断页面是否加载完毕

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<script type="text/javascript">

document.onreadystatechange = function(){   

        if(document.readyState=="complete")   

        {   

        alert('加载完毕'); 

        } 

</script>

 

 

 

There are five possible values for readyState: 
0 (Uninitialized): The object has been created but the open() method hasn’t been called. 
1 (Loading): The open() method has been called but the request hasn’t been sent. 
2 (Loaded): The request has been sent. 
3 (Interactive). A partial response has been received. 
4 (Complete): All data has been received and the connection has been closed. 

readyState有五种可能的值:
0 (未初始化): (xmlHttpRequest)对象已经创建,但还没有调用open()方法。
1 (载入):已经调用open() 方法,但尚未发送请求。
2 (载入完成): 请求已经发送完成。
3 (交互):可以接收到部分响应数据。
4 (完成):已经接收到了全部数据,并且连接已经关闭。

 

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