var http = false;
		if (window.XMLHttpRequest)
			{
				http = new XMLHttpRequest();
			}
		else if (window.ActiveXObject)
			{
				http = new ActiveXObject("Microsoft.XMLHTTP");
			}
		var statusText = new Array();
		statusText[100] = "Continue";
		statusText[101] = "Switching Protocols";
		statusText[200] = "OK";
		statusText[201] = "Created";
		statusText[202] = "Accepted";
		statusText[203] = "Non-Authoritative Information";
		statusText[204] = "No Content";
		statusText[205] = "Reset Content";
		statusText[206] = "Partial Content";
		statusText[300] = "Multiple Choices";
		statusText[301] = "Moved Permanently";
		statusText[302] = "Found";
		statusText[303] = "See Other";
		statusText[304] = "Not Modified";
		statusText[305] = "Use Proxy";
		statusText[306] = "(unused, but reserved)";
		statusText[307] = "Temporary Redirect";
		statusText[400] = "Bad Request";
		statusText[401] = "Unauthorized";
		statusText[402] = "Payment Required";
		statusText[403] = "Forbidden";
		statusText[404] = "Not Found";
		statusText[405] = "Method Not Allowed";
		statusText[406] = "Not Acceptable";
		statusText[407] = "Proxy Authentication Required";
		statusText[408] = "Request Timeout";
		statusText[409] = "Conflict";
		statusText[410] = "Gone";
		statusText[411] = "Length Required";
		statusText[412] = "Precondition Failed";
		statusText[413] = "Request Entity Too Large";
		statusText[414] = "Request-URI Too Long";
		statusText[415] = "Unsupported Media Type";
		statusText[416] = "Requested Range Not Satisfiable";
		statusText[417] = "Expectation Failed";
		statusText[500] = "Internal Server Error";
		statusText[501] = "Not Implemented";
		statusText[502] = "Bad Gateway";
		statusText[503] = "Service Unavailable";
		statusText[504] = "Gateway Timeout";
		statusText[505] = "HTTP Version Not Supported";
		statusText[509] = "Bandwidth Limit Exceeded";
		function rc_post(idget)
			{
				var num = document.getElementById(idget).elements.length;
				var url = "";
				//radio button 
				var j = 0;
				var a = 0;
				var radio_buttons = new Array();
				var nome_buttons = new Array();
				var the_form = window.document.getElementById(idget);
				for(var i=0; i<the_form.length; i++)
					{
						var temp = the_form.elements[i].type;
						if ( (temp == "radio") && ( the_form.elements[i].checked) )
							{ 
								nome_buttons[a] = the_form.elements[i].name;
								radio_buttons[j] = the_form.elements[i].value; 
								j++; 
								a++;
							}
					}
				for(var k = 0; k < radio_buttons.length; k++)
					{
						url += nome_buttons[k] + "=" + radio_buttons[k] + "&";
					}
				//checkbox
				var j = 0;
				var a = 0;
				var check_buttons = new Array();
				var nome_buttons = new Array();
				var the_form = window.document.getElementById(idget);
				for(var i=0; i<the_form.length; i++)
					{
						var temp = the_form.elements[i].type;
						if ( (temp == "checkbox") && ( the_form.elements[i].checked) )
							{ 
								nome_buttons[a] = the_form.elements[i].name;
								check_buttons[j] = the_form.elements[i].value; 
								j++; 
								a++;
							}
					}
				for(var k = 0; k < check_buttons.length; k++)
					{
						url += nome_buttons[k] + "=" + check_buttons[k] + "&";
					}
				for (var i = 0; i < num; i++)
					{
						
						var chiave =document.getElementById(idget).elements[i].name;
						var valore =document.getElementById(idget).elements[i].value;
						var tipo =document.getElementById(idget).elements[i].type;
						if ( (tipo == "submit") || (tipo == "radio") || (tipo == "checkbox") )
							{}
						else
							{
								url += chiave + "=" + valore + "&";
							}
					}
				return url;
			}
		function ajax(action,target,get,idform)
			{
				if (!get)
					{
						get="GET";
					}
				parameters="";
				get=get.toUpperCase();
				document.getElementById(target).innerHTML = '<p align="center"><img border="0" src="http://www.fieraelettronica.it/imm/ajax-loader.gif" width="15" /></p>';
				if (get=="GET")
					{
						if(idform)
							{
								parameters = rc_post(idform);
								action=action+"?"+parameters;
							}
					    http.open(get, action);
					    http.onreadystatechange = function ()
							{
								ajaxdone(target);
							}
					    http.send(null);
					}
				if (get=="POST")
					{
						parameters= rc_post(idform);
					    http.open(get, action);
					    http.onreadystatechange = function ()
							{
								ajaxdone(target);
							}
						http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
					    http.send(parameters);	
					}
			}
		function ajaxdone(target)
			{
				if (http.readyState == 4)
					{ 
						if(statusText[http.status] === "OK")
							{
								document.getElementById(target).innerHTML = http.responseText;
							}
						else
							{
								document.getElementById(target).innerHTML = "Impossibile effettuare l'operazione richiesta.<br />" +"Errore riscontrato: " + statusText[ajax.status];
							}
					}
			}