function promo () {
var xhr_object = null;

if(window.XMLHttpRequest) // Firefox
   xhr_object = new XMLHttpRequest();
else if(window.ActiveXObject) // Internet Explorer
   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");

xhr_object.open("GET", "promo.xml", true);

xhr_object.onreadystatechange = function() {
	   if(this.readyState == 4) {
	   rteNode = xhr_object.responseXML.getElementsByTagName('item').item(0);
		for(var i=0; i<rteNode.childNodes.length; i++){
      switch( rteNode.childNodes.item(i).tagName ){
        case 'title':
                 titre = rteNode.childNodes.item(i).firstChild.data;
        break;
        case 'description':
                 description = rteNode.childNodes.item(i).firstChild.data;
        break;
		case 'link':
                 datefinpromo = rteNode.childNodes.item(i).firstChild.data;
        break;
        default:
        break;
    }}

	   jj =  datefinpromo.substr(0,2);
	   mm =  datefinpromo.substr(3,2);
	   aaaa = datefinpromo.substr(6,4);
	   today = new Date;
	   jour = today.getDate();
	   mois = (today.getMonth())+1;
	   annee = today.getFullYear();
	   if ( (aaaa > annee) || (aaaa == annee && mm > mois) ||(aaaa = annee && mm == mois && jj >= jour)) {
	   document.getElementById('promo').style.display = 'block';
	   lemois = document.getElementById('mois');
	   switch( mm ){
        case '01':
                 lemois.innerHTML = "JANVIER";
        break;
        case '02':
                 lemois.innerHTML = "FÉVRIER";
        break;
        case '03':
                 lemois.innerHTML = "MARS";
        break;
        case '04':
                 lemois.innerHTML = "AVRIL";
        break;
        case '05':
                 lemois.innerHTML = "MAI";
        break;
        case '06':
                 lemois.innerHTML = "JUIN";
        break;
        case '07':
                 lemois.innerHTML = "JUILLET";
        break;
        case '08':
                 lemois.innerHTML = "AOÛT";
        break;
        case '09':
                 lemois.innerHTML = "SEPTEMBRE";
        break;
        case '10':
                 lemois.innerHTML = "OCTOBRE";
        break;
        case '11':
                 lemois.innerHTML = "NOVEMBRE";
        break;
        case '12':
                 lemois.innerHTML = "DÉCEMBRE";
        break;
		
        default:
        break;
    }
	   
	   document.getElementById('mypromo').innerHTML = '<h1>' + titre +'</h1>' + description +'<br><br>' + '<span style="text-decoration: blink; color:red">fin de validité de l\'offre : ' + datefinpromo + '</span>';
	   
   }}
}

xhr_object.send(null);
}

function aficpromo () {
		divpromo = document.getElementById('promopopup');
		divpromo.style.opacity = '0';
	   divpromo.style.display = 'block';
	   i = 50;
	   fondu = setInterval( function() {
	   if (i>100)divpromo.style.opacity = (i-100)/100;
	   if (i<200) i=i+10;
		} ,40);
		setTimeout( function() {
		clearInterval(fondu);
		divpromo.style.opacity = 1;
		} ,1500);
}