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xmlhttp = new XMLHttpRequest();
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if (xmlhttp.overrideMimeType) {
xmlhttp.overrideMimeType("text/xml");
}
} else if (window.ActiveXObject) {
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var activexName = ["MSXML2.XMLHTTP","Microsoft.XMLHTTP"];
for (var i = 0; i < activexName.length; i++) {
try{
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xmlhttp = new ActiveXObject(activexName[i]);
break;
} catch(e){
}
}
}
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if (!xmlhttp) {
alert("XMLHttpRequest¶ÔÏó´´½¨Ê§°Ü!!");
return;
} else {
alert(xmlhttp.readyState);
}

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xmlhttp.onreadystatechange = callback;

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