創建 XMLHttpRequest

<script language="javascript" type="text/javascript">
var request = false;
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = false;
}
}
}

if (!request)
alert("Error initializing XMLHttpRequest!");

function getCustomerInfo() {
var phone = document.getElementById("phone").value;
var url = "/lookupCustomer.jsp?phone=" + escape(phone);
request.onreadystatechange = updatePage;
request.open("GET", url, true);

request.send(null);
}
/**回調方法,每次狀態碼改變都會被調用*/
function updatePage() {
if (request.readyState == 4) {
if (request.status == 200) {
var response = request.responseText.split("|");
document.getElementById("order").value = response[0];
document.getElementById("address").innerHTML =
response[1].replace(/\n/g, "");
} else
alert("status is " + request.status);
}
}
</script>

總結

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