simpleRequest.html
<!DOCTYPE html PUTLIC "-//W3C//DTD XHMTL 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Simple XMLHttpRequest</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();
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET", "simpleResponse.xml", true);
xmlHttp.send(null);
}
function handleStateChange() {
if(xmlHttp.readyState == 4) {
if(xmlHttp.status == 200) {
alert("The server replied with: " + xmlHttp.responseText);
}
}
}
</script>
</head>
<body>
<form action = "#">
<input type="button" value = "Start Basic Asynchronous Request" onclick="startRequest();" />
</form>
</body>
</html>
simpleResponse.xml
<?xml version="1.0" encoding = "utf-8">
<abc>123334</abc>
</xml>
也可以直接只写一行文本。可以看出即使请求的是XML文件，但以responseText方式返回的只能是文本形式。
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