原生Ajax 和Jq Ajax

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 前言:這次介紹的是利用ajax與後台進行資料交換的小例子,所以demo必須通過伺服器來開啟。伺服器環境 非常好搭建,從網上下載wamp或xampp,一步步安裝就ok,然後再把寫好的頁面放在伺服器中指定的位置。開啟時,在瀏覽器地址欄輸入 “localhost/指定頁面”或者“127.0.0.1/指定頁面”開啟。

  下面列出demo的HTML、PHP、原生ajax 、jq ajax代碼。

  HTML代碼:

<!doctype html><html><head>    <title>ajax樣本</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‘>        <!--要插入的內容-->        </div>    </div></body><script type="text/javascript" charset="utf-8" src="js/jQuery.js"></script></html>

  PHP代碼:

<?php$details = array (    ‘spring‘    =>    "<img src=‘images/spring.jpg‘ alt=‘‘ /><p>人間四月芳菲盡,山寺桃花始盛開</p>",    ‘summer‘    =>    "<img src=‘images/summer.jpg‘ alt=‘‘ /><p>水晶簾動微風起,滿架薔薇一院香</p>",    ‘fall‘    =>    "<img src=‘images/fall.jpg‘ alt=‘‘ /><p>金井梧桐秋葉黃,珠簾不卷夜來霜</p>",    ‘winter‘        =>    "<img src=‘images/winter.jpg‘ alt=‘‘ /><p>梅須遜雪三分白,雪卻輸梅一段香</p>");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(‘沒有成功建立請求‘)            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("失敗!");                        }        })                        });
</script>

原生Ajax 和Jq Ajax

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