function getXMLHttpRequest() {
	var xhr = null;
	
	if (window.XMLHttpRequest || window.ActiveXObject) {
		if (window.ActiveXObject) {
			try {
				xhr = new ActiveXObject("Msxml2.XMLHTTP");
			} catch(e) {
				xhr = new ActiveXObject("Microsoft.XMLHTTP");
			}
		} else {
			xhr = new XMLHttpRequest(); 
		}
	} else {
		alert("Votre navigateur ne supporte pas l'objet XMLHTTPRequest...");
		return null;
	}
	
	return xhr;
}

function ajoutphoto(form, id,pos){

  var xhr = getXMLHttpRequest();
  xhr.onreadystatechange = function() {

    if(xhr.readyState == 4 && xhr.status == 200){

      document.getElementById(form).innerHTML = xhr.responseText;

     }

   }



  xhr.open("GET",'../../../modules/admin_pages/ajout_upload.php?id='+id+'&p='+pos,true);

  xhr.setRequestHeader('Content-Type','x-www-form-urlencoded');

  xhr.send(null);

 }