function getAjaxConnection(){
	var xhr = null; 
	
	if(window.XMLHttpRequest){ // Firefox et autres
		xhr = new XMLHttpRequest(); 
	} else if(window.ActiveXObject){ // Internet Explorer 
	   	try {
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	} else { 
		// XMLHttpRequest non supporté par le navigateur 
		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
		xhr = false; 
	}  
  
  return xhr;
}

function connectURL(url)
{
	if(window.XMLHttpRequest) // FIREFOX
		xhr_object = new XMLHttpRequest();
	else if(window.ActiveXObject) // IEx
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else
		return(false);
		
	xhr_object.open("GET", url, false);
	xhr_object.send(null);
	
	if(xhr_object.readyState == 4)
		return(xhr_object.responseText);
	else 
		return(false);
}