用js实现Ajax

来源：互联网发布：广东新丰网络问政平台编辑：程序博客网时间：2024/06/06 08:36

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Demo</title>
<style>
body, input, select, button, h1 {
font-size: 28px;
line-height:1.7;
}
</style>
</head>

<body>

<h1>员工查询</h1>

<label>请输入员工编号：</label>
<input type="text" id="keyword" />
<button id="search">查询</button>
<p id="searchResult"></p>

<h1>员工新建</h1>
<label>请输入员工姓名：</label>
<input type="text" id="staffName" /><br>
<label>请输入员工编号：</label>
<input type="text" id="staffNumber" /><br>
<label>请选择员工性别：</label>
<select id="staffSex">
<option>女</option>
<option>男</option>
</select><br>
<label>请输入员工职位：</label>
<input type="text" id="staffJob" /><br>
<button id="save">保存</button>
<p id="createResult"></p>

<script>
document.getElementById("search").onclick = function() {
//发送Ajax请求并处理
var request = new XMLHttpRequest();
request.open("GET", "server.php?number=" + document.getElementById("keyword").value);
request.send();
request.onreadystatechange = function() {
if (request.readyState===4) {
if (request.status===200) {
document.getElementById("searchResult").innerHTML = request.responseText;
} else {
alert("发生错误：" + request.status);
}
}
}
}

document.getElementById("save").onclick = function() {
var request = new XMLHttpRequest();
request.open("POST", "server.php");
var data = "name=" + document.getElementById("staffName").value
+ "&number=" + document.getElementById("staffNumber").value
+ "&sex=" + document.getElementById("staffSex").value
+ "&job=" + document.getElementById("staffJob").value;
request.setRequestHeader("Content-type","application/x-www-form-urlencoded");
request.send(data);
request.onreadystatechange = function() {
if (request.readyState===4) {
if (request.status===200) {
document.getElementById("createResult").innerHTML = request.responseText;
} else {
alert("发生错误：" + request.status);
}
}
}
}
</script>
</body>
</html>

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