function getXhr ()
{

	var xhr; // objet XMLHttpRequest
	
	if (document.all)
	{
		xhr = new ActiveXObject ("Microsoft.XMLHTTP");
	}
	else
	{
		
		xhr = new XMLHttpRequest ();
		
		try
		{
			netscape.security.PrivilegeManager.enablePrivilege
				('UniversalBrowserRead');
		}
		catch (e){}
	}

	return xhr;
}

function afficherDatesResa(jsonval)
{
	txt_arrivee = jsonval;
	
	document.getElementById('txt_arrivee').value = txt_arrivee[0] ;
    $('sl_sem1').set('value',txt_arrivee[1]);
    $('sl_sem2').set('value',txt_arrivee[2]);
    $('sl_sem3').set('value',txt_arrivee[3]);
    $('sl_sem4').set('value',txt_arrivee[4]);
	document.getElementById('txt_depart').value = 
        String($('sl_semaine').getSelected().getProperty('value'));
}

function semaine_change()
{
    document.getElementById('txt_depart').value = 
        String($('sl_semaine').getSelected().getProperty('value'));
}

function changerMois(bienid,mois,annee)
{
	var xhr = getXhr ();
	
	xhr.onreadystatechange = function ()
	{
		if (xhr.readyState == 4)
		{
			lecalendrier = xhr.responseText;
			
			document.getElementById('lecalendrier').innerHTML = lecalendrier;
		}
		else
		{
			document.getElementById('lecalendrier').innerHTML = "<img src='http://groupimo.fr/www2/w3-utils/Images/ajax-loader.gif' />";
		}
	};
	
	var url = "majcal.php";
	url += "?id=" + encodeURIComponent(bienid);
	url += "&mois=" + encodeURIComponent(mois);
	url += "&an=" + encodeURIComponent(annee);
	xhr.open ("GET",url);
	
	// ne pas oublier �a pour le post
	//xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	// ne pas oublier de poster l'idregion
	xhr.send(null);
}