/*## MicroAJAX 1.5 (30.06.2008) ##*/

/*# HTTP Request Object Creator (MAX Compatibility) #*/
function create_connector(){

	var http_conn=false;

	var activex_objects=new Array("Msxml2.XMLHTTP","Microsoft.XMLHTTP","Msxml2.XMLHTTP.6.0","Msxml2.XMLHTTP.5.0","Msxml2.XMLHTTP.4.0","Msxml2.XMLHTTP.3.0","WinHttp.WinHttpRequest.5","WinHttp.WinHttpRequest.5.1");

	if(window.XMLHttpRequest){

		http_conn=new XMLHttpRequest();

		if(http_conn.overrideMimeType){

			http_conn.overrideMimeType('text/plain');
		}
	}
	else if(window.ActiveXObject){

		for(var i=0;i<activex_objects.length;i++){

			try{

				http_conn=new ActiveXObject(activex_objects[i]);
			}
			catch(e){}

			if(http_conn){

				break;
			}
		}
	}

	if(!http_conn){

		alert("Ajax Error: Cannot create XMLHTTP instance!");
		return false;
	}

	return http_conn;
};


/*## HTTP GET request sender ##*/
function send_request(url,args){

	var http=create_connector();

	if(http){

		http.onreadystatechange=function(){ manage_response(http); };
		http.open('GET',url+"?"+args,true);
		http.send(null);
	}
	else{

		alert("Ajax Error: No http connection.");
	}

	return;
};


/*## HTTP POST request sender ##*/
function send_post_request(url,args){

	var http=create_connector();

	if(http){

		http.onreadystatechange=function(){ try{ manage_response(http); }catch(e){} };
		http.open('POST',url,true);
		http.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
		http.send(args);
	}
	else{

		alert("Ajax Error: No http connection.");
	}

	return true;
};


/*## HTTP request output manager ##*/
function manage_response(http){

	if(http.readyState==4){

		if(http.status==200){

			var res_txt=http.responseText;
			http=null;

			if(res_txt=="refresh"){

				if(window.document.location.href.indexOf("?")!=-1){

					window.document.location.href=window.document.location.href.substring(0,window.document.location.href.indexOf("?"));
				}
				else{

					window.document.location.reload();
				}

			}
			else if(res_txt=="refresh_this"){

				window.document.location.reload();
			}
			else if(res_txt.indexOf("alert@")!=-1){

				alert(res_txt.replace("alert@",""));
			}
			else if(res_txt.indexOf("exec@")!=-1){

				eval(res_txt.replace("exec@",""));
			}
			else if(res_txt!="true"){

				alert("Ajax Error: PHP function call failed.\n"+res_txt);
				return false;
			}
		}
		else{

			alert("Ajax Error: Request error.");
		}
	}

	return true;
};


/*## HTTP XHTML request sender ##*/
function send_xhtml_request(url,args,xhtml_cref,post_function){

	var xmlhttp=create_connector();

	if(xmlhttp){

		xmlhttp.onreadystatechange=function(){ write_down_xhtml(xmlhttp,xhtml_cref,post_function); };
		xmlhttp.open("POST",url,true);
		xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
		xmlhttp.send(args);
	}
	else{

		alert("Ajax Error: No http connection.");
	}

	return true;
};


/*## HTTP XHTML request printer ##*/
function write_down_xhtml(xmlhttp,xhtml_cref,post_function){

	if(xmlhttp.readyState==4){

		if(xmlhttp.status==200){

			/* cattura la risposta del server e la divide in HTML e FUNZIONEdiRITORNO */
			var full_response=xmlhttp.responseText.split("|||@|||");
			xmlhttp=null;


			/* scrive l'html se esiste */
			if(full_response[0]!=""){

				xhtml_cref.innerHTML=full_response[0];
			}


			/* esegue una possibile funzione ritornata insieme alla risposta */
			try{
				eval(full_response[1]);
			}
			catch(e){}


			/* esegue la funzione fissa da eseguire dopo l'arrivo della risposta */
			if(post_function!=false){

				eval(post_function);
			}
		}
		else{

			alert("Ajax Error: Request error.");
		}
	}

	return true;
};