原生Ajax 和jQuery Ajax的区别示例分析
前言:这次介绍的是利用ajax与后台进行数据交换的小例子,所以demo必须通过服务器来打开。服务器环境非常好搭建,从网上下载wamp或xampp,一步步安装就ok,然后再把写好的页面放在服务器中指定的位置。打开时,在地址栏输入“localhost/指定页面”或者“127.0.0.1/指定页面”打开。
下面列出demo的html、php、原生ajax 、jq ajax代码。
html代码:
代码如下:
<!doctype html>
<html>
<head>
<title>ajax示例</title>
<meta charset='utf-8' />
<link rel="stylesheet" type="text/css" href="css/common.css" />
<style type="text/css">
.main{height:400px;width:800px;margin:100px auto 0;border:1px solid #000;}
.list{height:400px;width:200px;float:left;background:#ddd;}
.inf{height:400px;width:600px;float:right;background:#ccc;text-align:center;}
.list li{width:200px;text-align:center;margin:50px 0 0;font-size:24px;cursor: pointer;
}
.inf img{width:360px;height:270px;margin:15px auto;}
.inf p{width:580px;text-align:left;text-indent:2em;font-size:14px;margin:0 10px;}
</style>
</head>
<body>
<p class='main'>
<p class='list' id='list'>
<ul>
<li name='spring' id='spring'>春</li>
<li name='summer' id='summer'>夏</li>
<li name='fall' id='fall'>秋</li>
<li name='winter' id='winter'>冬</li>
</ul>
</p>
<p class='inf' id='inf'>
<!--要插入的内容-->
</p>
</p>
</body>
<script type="text/javascript" charset="utf-8" src="js/jquery.js"></script>
</html>
php代码:
代码如下:
<?php
$details = array (
'spring' => "<img src='images/spring.jpg' alt='' /><p>人间四月芳菲尽,山寺桃花始盛开</p>",
'summer' => "<img src='images/summer.jpg' alt='' /><p>水晶帘动微风起,满架蔷薇一院香</p>",
'fall' => "<img src='images/fall.jpg' alt='' /><p>金井梧桐秋叶黄,珠帘不卷夜来霜</p>",
'winter' => "<img src='images/winter.jpg' alt='' /><p>梅须逊雪三分白,雪却输梅一段香</p>"
);
echo $details[$_request['liname']];
?>
原生ajax:
代码如下:
<script type="text/javascript">
var lis = document.getelementbyid('list').getelementsbytagname('li');
window.onload = initpage;
function initpage() {
for (var i=0; i<lis.length; i++) {
txt = lis[i];
txt.onclick = function () {
getdetails(this.id);
}
}
}
function creatrequest() {
try {
request = new xmlhttprequest();
}
catch (tryms) {
try {
request = new activexobject("msxml2.xmlhttp");
}
catch (otherms) {
try {
request = new activexobject("miscrosoft.xmlhttp");
}
catch (failed) {
request = null;
}
}
}
return request;
}
function getdetails(itemname) {
request = creatrequest();
if (request == null) {
alert('没有成功创建请求')
return;
}
var url = "getdetails.php?liname="+escape(itemname);
request.open("get",url,true);
request.onreadystatechange = displaydetails;
request.send(null);
}
function displaydetails() {
if (request.readystate == 4) {
if (request.status == 200) {
detaildiv = document.getelementbyid("inf");
detaildiv.innerhtml = request.responsetext;
}
}
}
</script>
jq ajax:
代码如下:
<script type="text/javascript">
$('#list li').click ( function () {
$.ajax({
type:'get',
data:'',
url:"getdetails.php?liname="+this.id,
success:function(data){
$('#inf').html(data);
},
datatype:'text',
error:function (){
alert("失败!");
}
})
});
</script>
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