function createRequestObject() {
	var ro;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		ro = new ActiveXObject("Microsoft.XMLHTTP");
	}else{
		ro = new XMLHttpRequest();
	}
	return ro;
}
	
var http = createRequestObject();
	
function sndReq(action) {
	http.open('POST', action);
	http.onreadystatechange = handleResponse;
	http.send(null);
}
	
function handleResponse() {
	if(http.readyState == 4){
	var response = http.responseText;
	alert(response);
	//si vull imprimir la resposta en un combo, per exemple...
	//document.getElementById('MessBox').value = response;
	}
}