var desHttp=null;
var derichiesta="";
function GetXmlHttpObject()
{
var desHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 desHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  desHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  desHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return desHttp;
}

function show_des(chiamata)
{ 
derichiesta=chiamata;
desHttp=GetXmlHttpObject();
if (desHttp==null)
 {
 alert ("Browser does not support HTTP Request");
 return
 } 
var url="getdesigne.php";
url=url+"?chiamata="+escape(derichiesta);
url=url+"&sid="+Math.random();
desHttp.onreadystatechange=stateChangedes; 
desHttp.open("GET",url,true);
desHttp.send(null);  
}

function stateChangedes() 
{ 
if (desHttp.readyState==4 || desHttp.readyState=="complete")
 {  
 document.getElementById("content").innerHTML=desHttp.responseText;
 document.getElementById("menu").innerHTML='';
 } 
 }