function createRequestObject(){
var req;
if(window.XMLHttpRequest){
//For Firefox, Safari, Opera
req = new XMLHttpRequest();
}
else if(window.ActiveXObject){
//For IE 5+
req = new ActiveXObject("Microsoft.XMLHTTP");
}
else{
//Error for an old browser
alert('Your browser is not IE 5 or higher, or Firefox or Safari or Opera');
}

return req;
}

//Make the XMLHttpRequest Object
var http = createRequestObject();

function sendRequest(method, url){
if(method == 'get' || method == 'GET'){
http.open(method,url);
http.onreadystatechange = handleResponse;
http.send(null);
}
}

function handleResponse(){
if(http.readyState == 4 && http.status == 200){
var response = http.responseText;
if(response){
document.getElementById("ajax_res").innerHTML = response;
}
}
}