首页 > 代码库 > 原生Ajax 和Jq Ajax

原生Ajax 和Jq Ajax

 

  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,在浏览器地址栏输入“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:

<!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>
    <div class=‘main‘>
        <div 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>
        </div>
        <div class=‘inf‘ id=‘inf‘>
        <!--要插入的内容-->
        </div>
    </div>
</body>
<script type="text/javascript" charset="utf-8" src="http://www.mamicode.com/js/jQuery.js"></script>
</html>

  PHP代码:

<?php

$details = array (
    ‘spring‘    =>    "<img src=http://www.mamicode.com/‘images/spring.jpg‘ alt=‘‘ />

人间四月芳菲尽,山寺桃花始盛开

", ‘summer‘ => "<img src=http://www.mamicode.com/‘images/summer.jpg‘ alt=‘‘ />

水晶帘动微风起,满架蔷薇一院香

", ‘fall‘ => "<img src=http://www.mamicode.com/‘images/fall.jpg‘ alt=‘‘ />

金井梧桐秋叶黄,珠帘不卷夜来霜

", ‘winter‘ => "<img src=http://www.mamicode.com/‘images/winter.jpg‘ alt=‘‘ />

梅须逊雪三分白,雪却输梅一段香

" ); echo $details[$_REQUEST[‘LiName‘]]; ?>

  原生ajax:

<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:

<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>

 来自:http://www.cnblogs.com/duanhuajian/archive/2012/10/20/2731840.html

原生Ajax 和Jq Ajax