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felayman---ajax对象的兼容写法

2024-07-03 04:31:43   224人阅读

<html>
<head>
<script type="text/javascript">
 function FactoryXMLHttpRequest() { 
    if(window.XMLHttpRequest) { 
        return new XMLHttpRequest(); 
    }else if(window.ActiveXObject) { 
        var msxmls = new Array( 
            ‘Msxml2.XMLHTTP.5.0‘, 
            ‘Msxml2.XMLHTTP.4.0‘, 
            ‘Msxml2.XMLHTTP.3.0‘, 
            ‘Msxml2.XMLHTTP‘, 
            ‘Microsoft.XMLHTTP‘); 
        for (var i = 0; i < msxmls.length; i++) { 
            try { 
                return new ActiveXObject(msxmls[i]); 
            } catch (e) { 
            } 
        } 
    } 
    throw new Error("Could not instantiate XMLHttpRequest"); 
}   
    var xmlHttp = FactoryXMLHttpRequest();
    xmlHttp.open("get","index.php",true);
    xmlHttp.onreadystatechange =function(){
        if(xmlHttp.readyState==4){
            alert(xmlHttp.responseText);
        }
    }
   xmlHttp.send(null);
	
</script>
</head>
<body>
</body>
</html>


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