var http_request = false;
   function makePOSTRequest_aj(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         /*
         if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/html');
         }
         */
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents_aj;
      http_request.open('GET', url, true);
      http_request.send(parameters);
   }

  function alertContents_aj() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //result = http_request.responseXML;            
             var xml = http_request.responseXML;
						id_c=xml.getElementsByTagName('id')[0].firstChild.nodeValue;
            if (xml.getElementsByTagName('code')[0].firstChild.nodeValue=="1")
            {
            	document.getElementById('myspan'+id_c).innerHTML = '';
            	if (document.getElementById('myspanNB'+id_c))
            		document.getElementById('myspanNB'+id_c).innerHTML = document.getElementById('myspanNB'+id_c).innerHTML* 1+1;
            }
            else
            	{
            	document.getElementById('myspan'+id_c).innerHTML = '';
            	}
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj,usr,Itype) {
      makePOSTRequest_aj('/aj_cri.php?critique='+obj+'&id_user='+usr+'&type='+Itype, null);
   }