ajax与xml数据交互
AJAX可以通过使用XML文件来让信息产生互动
AJAX XML 实例
在先面的AJAX实例中我们将演示如何让WEB页面使用AJAX技术来获取到来自XML文件的信息
从下拉框中选择一盘CD
选择CD: Bob DylanBonnie TylerDolly Parton
TITLE: Greatest Hits
ARTIST: Dolly Parton
COUNTRY: USA
COMPANY: RCA
PRICE: 9.90
YEAR: 1982
AJAX 实例解析
The example above contains a simple HTML form and a link to a JavaScript:
上面的举例包含了简单的HTML表单以及连接到JS的link：
<html>
<head>
<script src="selectcd.js"></script>
</head>
<body>
<form>
Select a CD:
<select name="cds" onchange="showCD(this.value)">
<option value="Bob Dylan">Bob Dylan</option>
<option value="Bonnie Tyler">Bonnie Tyler</option>
<option value="Dolly Parton">Dolly Parton</option>
</select>
</form>
<p>
<div id="txtHint"><b>CD info will be listed here.</b></div>
</p>
</body>
</html>
As you can see it is just a simple HTML form with a simple drop down box called "cds".
正如你所看到的，它只是简单的HTML表单，里面有个名为"cds"的下拉框
The paragraph below the form contains a div called "txtHint". The div is used as a placeholder for info retrieved from the web server.
在表单下面的段落里有一个名为"txtHint"的div。它可用来显示从web服务器上获取到的信息
When the user selects data, a function called "showCD" is executed. The execution of the function is triggered by the "onchange" event. In other words: Each time the user change the value in the drop down box, the function showCD is called.
当用户选择了信息，一个名为"showCD"的函数就会被执行。这个函数执行与"onchange"事件相关联。换句话说：每当用户改变了下拉框里的内容，这个函数就会执行。
The JavaScript code is listed below.
JS代码将在下面列出
The AJAX JavaScript
This is the JavaScript code stored in the file "selectcd.js":
这个名为"selectcd.js"的JS文件保存了我们前面所讲到的代码：
var xmlHttp
function s
