var oXHR = false;

if(window.XMLHttpRequest){
	oXHR = new XMLHttpRequest();
}
else if(window.ActiveXObject){
	oXHR = new ActiveXObject("Microsoft.XMLHTTP");
}

// Método GET:
function getData(sURL,oElem){
	oXHR.open("GET",sURL,true);
	oXHR.onreadystatechange = function(){
		if(oXHR.readyState == 4 && oXHR.status == 200){
			var retorno = oXHR.responseText;
			oElem.innerHTML = retorno;
		}
	}
	oXHR.send(null);
}