var http_request = false;
   function makePOSTRequest(url, parameters) {	  
      ptag = document.createElement('p');
	  ptag.setAttribute('align','center');
	  image = document.createElement('img');
      image.setAttribute('border','0');
      image.src = 'http://www.portail.ma/img/wait.gif';
	  ptag.appendChild(image);
      document.getElementById("tableajout").appendChild(ptag);
   
      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;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            document.getElementById("tableajout").removeChild(ptag);
			cacher('tableajout');
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
      var poststr = "rss=" + encodeURI( document.getElementById("rss").value ) +
                    "&nom=" + encodeURI( document.getElementById("nom").value ) +
					"&cat=" + encodeURI( document.getElementById("cat").value ) +
					"&souscat=" + encodeURI( document.getElementById("souscat").value );
      makePOSTRequest('ajout.php', poststr);
   }