// JavaScript Document
function callAjax(){
	var request = false;
	
	try{
		request = new XMLHttpRequest();
	}
	catch(errore1) {
		try{request= new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(errore2)	{
			try{request= new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(errore3)	{
				request=false;
			}
		}
	}			
	return request;	
}