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A simple example of reading an XML file with Ajax _ajax related

Source: Internet
Author: User
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This allows you to send requests to read server-side XML data, and the last thing to do is to process the data. For XMLHttpRequest objects, refer to the About XMLHttpRequest object.

See Example:

Ajaxdemo.html
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title>asynchronous JavaScript and Xml</title>
<body>
<script type= "Text/javascript" >
var xmlhttp=null;
function Readystatechangehandle ()
{
if (xmlhttp.readystate==4)
{
if (xmlhttp.status==200)
{
var xmldom=xmlhttp.responsexml;
var xmlroot=xmldom.documentelement;
Try
{
var xmlitem=xmlroot.getelementsbytagname ("item");
alert (xmlitem[0].firstchild.data);
}
catch (E)
{
alert (e.message);
}
}
}
}
function Ajaxrequest ()
{
if (window. XMLHttpRequest)
{
Xmlhttp=new XMLHttpRequest ();
}
else if (window. ActiveXObject)
{
Xmlhttp=new ActiveXObject ("Microsoft.XMLHTTP");
}
Xmlhttp.onreadystatechange=readystatechangehandle;
Xmlhttp.open ("Get", "Data.xml", true);
Xmlhttp.send (NULL);
}
</script>
<input type= "button" onclick= "Ajaxrequest ()" value= "Take me to the world of AJAX"/>
</body>
Data.xml
<?xml version= "1.0" encoding= "GB2312"?>
<root>
<item>welcome to the world of AJAX (asynchronous JavaScript and XML)!</item>
</root>

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Related Keywords:
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