function chNumeroCasuale(Da,A) {
	return Math.floor((A-Da+1) * Math.random() +Da);
}

var CaricaHTML_DatiPagina = new Array();

var req=new Array();
var semaforo=new Array();
var imgProgress = new Image();
imgProgress.src = '/img/progressbar.gif';

var chTimer=new Array();

function CaricaHTML(url, target, method, parameters, strFunzione) {


//alert(url+'\n'+target+'\n'+method+'\n'+parameters+'\n'+strFunzione)


	if((semaforo[target]==undefined || semaforo[target]==true) && url!=undefined){


		semaforo[target]=false
		url+=(url.indexOf('?')>0)?'&':'?';
		url+='nocache='+chNumeroCasuale(0,9999);
//alert(url);
//out.innerHTML+=('carico pagina: <a href="'+url+'" target="_blank">'+url+'</a><br>\n');
		if(method == undefined || method == '')method="get" 
		if(imgProgress!=''){
			if(document.getElementById(target)){
				//document.getElementById(target).innerHTML = 'caricamento dati in corso...';
				document.getElementById(target).innerHTML = '<img src='+imgProgress.src+'>';
			}
		}
		if(window.XMLHttpRequest){
			req[target] = new XMLHttpRequest();
		}else if(window.ActiveXObject){
			req[target] = new ActiveXObject("Microsoft.XMLHTTP");
		}
		if(req[target]){
			req[target].onreadystatechange = function() {
//alert(strFunzione)
				CaricaHTMLDone(url, target, method, strFunzione);
			};
			req[target].open(method, url, true);
			if ( (method == "POST") || (method == "post") ){
		//alert('post: '+url)
				req[target].setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				req[target].send(parameters);
			}
			else req[target].send("");
		}
	}
}  



function CaricaHTMLDone(url, target, method, strFunzione) {
	var stringa
//alert('readyState: '+req.readyState)
//out.innerHTML+='readyState: '+req.readyState+'<br>'
	if (req[target].readyState == 4) { 
		semaforo[target]=true;
//out.innerHTML+=target+'<br>';
		if (document.getElementById(target)){
			if (req[target].status == 200) { 
				stringa = req[target].responseText+'';
//alert(stringa)
				
//alert('è stata caricata la pagina: '+url)
				document.getElementById(target).innerHTML = stringa;
				var re
				re=/<\!--\$dati:(.*)\$dati-->/
				var ris = req[target].responseText.match(re);
				if(ris && ris[1])CaricaHTML_DatiPagina[target]=ris[1]
				else CaricaHTML_DatiPagina[target]=''
//alert(CaricaHTML_DatiPagina+'\n'+strFunzione)
				if(strFunzione){
//alert(strFunzione)
					chTimer[target]=setTimeout(strFunzione,1);
				}
			}else{
//alert("Error:\n"+req.statusText+" "+req.responseText)
				document.getElementById(target).innerHTML="Error:\n"+req[target].statusText+" "+req[target].responseText;
				CaricaHTML_DatiPagina[target]='';
			}
//	out.innerHTML+=('<b>è stata caricata la pagina: <a href="'+url+'" target="_blank">'+url+'</a></b><br>\n')
		}
	}
}