function request_meteo(f) 
{
  var l0    = f.elements["rville"];
  var index = l0.selectedIndex;
  if(index >0)
    {
    var xhr_object = null;
  		
  	if(window.XMLHttpRequest)       xhr_object = new XMLHttpRequest();
  	else if(window.ActiveXObject)   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
  	else
      { 
  		alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");
  		return;
      }
  
  	xhr_object.open("POST", "pages/include/request_29.php", true);
  	xhr_object.onreadystatechange = function anonymous() {
  		  if(xhr_object.readyState == 4)  document.getElementById('meteoresult').innerHTML = xhr_object.responseText;
  	    }
  
  	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  	var data = "rville="+escape(l0.options[index].value);
  	xhr_object.send(data);
    }
}