用Ajax读取XML格式的数据

83447400 2006-11-05

代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"  
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">  
<html>  
<head>  
<title>Ajax Hello World</title>  
<script type="text/javascript">  
var xmlHttp;  

function createXMLHttpRequest(){  
    if(window.ActiveXObject){  
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");  
    }  
    else if(window.XMLHttpRequest){  
        xmlHttp = new XMLHttpRequest();  
    }  
}  

function startRequest(){  
    createXMLHttpRequest();  
    try{  
        xmlHttp.onreadystatechange = handleStateChange;  
        xmlHttp.open("GET", "data.xml", true);  
        xmlHttp.send(null);      
    }catch(exception){  
        alert("您要访问的资源不存在!");  
    }  
}  

function handleStateChange(){      
    if(xmlHttp.readyState == 4){          
        if (xmlHttp.status == 200 || xmlHttp.status == 0){  
            // 取得XML的DOM对象  
            var xmlDOM = xmlHttp.responseXML;  
            // 取得XML文档的根  
            var root = xmlDOM.documentElement;              
            try  
            {  
                // 取得<info>结果  
                var info = root.getElementsByTagName('info');  
                // 显示返回结果  
                alert("responseXML's value: " + info[0].firstChild.data);  
            }catch(exception)  
            {  

            }  
        }  
    }  
}  
</script>  
</head>  
<body>  
    <div>  
        <input type="button" value="return ajax responseXML's value"  
                onclick="startRequest();" />  
    </div>  
</body>  
</html>

server.xml

代码如下:

<?xml version="1.0" encoding="GB2312" ?>  
<root> 
    <info>hello world!</info> 
</root>

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