function nascondi()
{
  document.getElementById("caricamento").style.display='none';
}

function createRequestObject() 
{ 
    var ro; 
    var browser = navigator.appName; 
    if(browser == "Microsoft Internet Explorer")
	{ 
        ro = new ActiveXObject("Microsoft.XMLHTTP"); 
		
    }else{ 
        ro = new XMLHttpRequest(); 
    } 
    return ro; 
} 

var http = createRequestObject(); 
  // http.SetRequestHeader("Content-Type", "text/html;charset='UTF-8'"); 

function sndReqArg(action,arg) 
{ 
   document.getElementById("caricamento").style.left= document.body.clientWidth -160;
   document.getElementById("caricamento").style.top=5;
   document.getElementById("caricamento").style.display='block';

   http.open('get', action+'?'+arg); 
   http.onreadystatechange = handleResponse; 
   http.send(null); 
} 



function handleResponse() 
{ 

   if(http.readyState == 4 && http.status == 200)
	{ 
        var response = http.responseText; 

        document.getElementById("sezionecontenuti").innerHTML = unescape(http.responseText); 
		setTimeout('nascondi()',1500);
    } 

}