new to XMLHttpRequest? try play around with this code
<!DOCTYPE HTML>
<html>
<head><title></title></head>
<body>
<input type="button" id="foo" value="load url" /><br/>
<input type="text" id="url" /><br/>
<textarea id="responses"></textarea>
<script type="text/javascript">
document.querySelector("#foo").addEventListener("click",function(ev){
var xhr=new XMLHttpRequest();
var url=document.querySelector("#url").value;
xhr.open("GET",url);
xhr.addEventListener("readystatechange",function(ev){
var xhr=ev.target;
if(xhr.readyState<4)return;
document.querySelector("#responses").value+=xhr.responseText;
alert(xhr.responseText);
});
xhr.send();
});
</script>
</body></html>