Ajax is used for dynamically changing a web-page( i.e. changing a part of the page without refreshing the whole page). Here is an example how it works:
1st file: Example.html
<html>
<head>
<script type="text/javascript">
function loadXMLDoc()
{
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","ajax_info.txt",true);
xmlhttp.send();
}
</script>
</head>
<body>
<div id="myDiv"><h2>Data will be shown here</h2></div>
<button type="button" onclick="loadXMLDoc()">Load Text</button>
</body>
</html>
2nd file: data.txt
"So here it shows how it works"
This way the ajax technology works.
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