var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
	if(this.readyState == 4 && this.status == 200) {
		document.getElementById("xhr").innerHTML = '<img src="yes.png" />';
	}
};
xhr.open("GET", "xhrdata.php?val=1&ext=0" ,true);
xhr.send(null);