<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript">
function callAjaxFn(){
var http;
if (window.XMLHttpRequest){
http = new XMLHttpRequest();
} else {
http = ActiveXObject ("Microsoft.XMLHTTP");
}
http.open("GET", "test.html", true);
http.send();
http.onreadystatechange=function(){
if (http.readyState == 4 && http.status == 200) {
alert(http.responseText);
}
}
}
</script>
</head>
<body>
<button onclick="callAjaxFn();" >Click Me</button>
</body>
</html>