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/ 12 Years ago, thu, may 17, 2012, 12:00:00
I'm trying to get an AJAX example working but i'm unable to get it working. Are you able to run it on XAMPP fine?
I've three files, message.txt, index.html, ajaxtest.js. When you click on the hyperlink it should bring up a pop up with the contents of message.txt. (all files are in the same directory)
index.html
<!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Strict//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd>
<html>
<head>
<title> Using XMLHttpRequest</title>
<script type=text/javascript src=ajaxtest.js></script>
</head>
<body>
<p>
<a href=message.txt onclick=grabFile(this.href); return false;>
Click here
</a>
</p>
</body>
</html>
ajaxtest.js
function getHTTPObject() {
var xhr = false;
if (window.XMLHttpRequest) { //see if a XMLHttpRequest exists
xhr = new XMLHttpRequest(); //if it exists change xhr to a new instance of the object
}
else if (window.ActiveXObject) { //see if ActiveX exists (for IE)
try { //Allows newer versions of IE to use the newer ActiveX object
xhr = new ActiveXObject(Msxml2.AMLHTTP); //if it exists change xhr to a new instance of the object
}
catch(e) { //catches an error and resets xhr to false
try { //Allows older versions of IE to fall back onto the older version using try...catch
xhr = new ActiveXObject(Microsoft.XMLHTTP); //if it exists change xhr to a new instance of the object
}
catch(e) {
xhr = false;
}
}
}
return xhr;
}
function grabFile(file) {
var request = getHTTPObject();
if (request) {
request.onreadystatechange = function() {
displayResponse(request);
};
request.open(GET, file, true);
request.send(null);
}
}
function displayResponse(request) {
if (request.readyState == 4) {
if (request.status == 200 || request.status == 304) {
alert(request.responseText);
}
}
}
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