function GetXmlHttpObject(){ 
			var objXMLHttp=null

			if (window.XMLHttpRequest){
				objXMLHttp=new XMLHttpRequest();
			}else if (window.ActiveXObject){			
				objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
			}
			return objXMLHttp;
		}	
		
		function makePOSTRequest(url, parameters, type) {
			http_request = false;
			http_request=GetXmlHttpObject();
			if (http_request==null){
				alert ("Browser does not support HTTP Request");
				return false;
			} 
			if (type=="ricarica")
				http_request.onreadystatechange = alertContentsRicarica;
			else
				http_request.onreadystatechange = alertContents;
			http_request.open('POST', url, true);
			http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
			http_request.setRequestHeader("Content-length", parameters.length);
			http_request.send(parameters);
		}


		function alertContents() {
			if (http_request.readyState == 4) {
				if (http_request.status == 200) {
					result=http_request.responseText;
					document.getElementById("foto").innerHTML = result;
					document.getElementById("confirm_box").style.display = "block";
				} else {
					alert('There was a problem with the request.');
				}
			}
		}

		function alertContentsRicarica() {
			if (http_request.readyState == 4) {
				if (http_request.status == 200) {
					result=http_request.responseText;
					document.getElementById("foto").innerHTML = result;
					document.getElementById("confirm_box").style.display = "none";
					document.getElementById("f1_upload_form").style.visibility = "visible";
				} else {
					alert('There was a problem with the request.');
				}
			}
		}