function istanzaXHR(){
var obj;
var creato = false;
try{
obj = new XMLHttpRequest();
creato = true;
}catch(e){
var IEXMLHttpRequestNames = new Array("Microsoft.XmlHttp", "MSXML4.XmlHttp", "MSXML3.XmlHttp","MSXML2.XmlHttp", "MSXML.XmlHttp");
for(var i = 0; i < IEXMLHttpRequestNames .length; i++){
try{
obj = new ActiveXObject(IEXMLHttpRequestNames[i]);
creato = true;
}catch(e){}
}
}
if(creato){
return obj;
}else{
return null;    
}
}
obj=istanzaXHR();
function invia(sid,voto){
inviaXHR(obj,"http://www.sfondicellulare.net/vote.php",sid,voto);
}
function inviaXHR(obj,url,sid,voto){
try{
obj.open("POST", url, true);
obj.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
document.getElementById("indicator_"+sid).style.visibility='visible';
obj.onreadystatechange = function(){
document.getElementById("li_"+sid).style.width=obj.responseText + 'px';
document.getElementById("indicator_"+sid).style.visibility='hidden';
}
obj.send("sid="+sid+"&voto="+voto);
}catch(e){
alert("Errore: "+e);
}
}