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使用纯粹的JavaScript创建一个AJAX请求:
function loadXMLDoc() {
var xmlhttp;
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else {
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 ) {
if(xmlhttp.status == 200){
alert("success");
}
else if(xmlhttp.status == 400) {
alert("error 400")
}
else {
alert("something broke")
}
}
}
xmlhttp.open("GET", "test.html", true);
xmlhttp.send();
}
来源: Stack Overflow
而使用jQuery创建AJAX请求:
$.ajax({
url: "test.html",
statusCode: {
200: function() {
alert("success");
},
400: function() {
alert("error 400");
}
},
error: function() {
alert("something broke");
}
});
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原文地址:http://www.cnblogs.com/papajia/p/4498200.html