var xmlHttp

function showCombo(page,divName,str)
{ 
	var divName=divName;
	//alert (page+' - '+divName+' - '+str);
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	 {
	 alert ("Browser does not support HTTP Request")
	 return
	 }
	var url=page;
	url=url+"?"+str
	url=url+"&sid="+Math.random()
	
	xmlHttp.onreadystatechange=stateChanged;

	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function stateChanged() 
	{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	 { 
	 document.getElementById("modello").innerHTML=xmlHttp.responseText 
	 }
}


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