function createXhrObject()
{
    if (window.XMLHttpRequest)
        return new XMLHttpRequest();
 
    if (window.ActiveXObject)
    {
        var names = [
            "Msxml2.XMLHTTP.6.0",
            "Msxml2.XMLHTTP.3.0",
            "Msxml2.XMLHTTP",
            "Microsoft.XMLHTTP"
        ];
        for(var i in names)
        {
            try{ return new ActiveXObject(names[i]); }
            catch(e){}
        }
    }
    window.alert("Votre navigateur ne prend pas en charge l'objet XMLHTTPRequest.");
    return null; // non supporté
}



function showExpress(i_id_article)
{
	xhr = createXhrObject();
	xhr.onreadystatechange=function()
	{
		if(xhr.readyState==4)
		{
			eval(xhr.responseText);
			if(open==true)
			{
				//var popupAchatExpress = window.open("/showroom/" + i_id_article + '/popproduit/', 'popup_achat_express_'+i_id_article, "menubar=no, status=no, scrollbars=no, menubar=no, width=950, height=450, directories=no, location=no, resizable=no, toolbar=no");  
				SqueezeBox.open('/showroom/' + i_id_article + '/popproduit/', { size: {x: 920, y: 415} });
			}
			else if(open==false)
			{
				document.location='/page404.php'; 
			}
		}
	}
	xhr.open("GET","/ws/check_achat_express_valide.php?id_article="+i_id_article,true);
	xhr.send(null);
}



//affiche la popup du produit lors d'un achat express
//function showExpress(i_id_article){
//	var popupAchatExpress = window.open("/showroom/" + i_id_article + '/popproduit/', 'popup_achat_express_'+i_id_article, "menubar=no, status=no, scrollbars=no, menubar=no, width=950, height=450, directories=no, location=no, resizable=no, toolbar=no");
//}