function rechercheCommune(debut){

if(debut.length>0){
document.getElementById('recherche').style.visibility='visible';

var xhr_object = null; 
	     
	if(window.XMLHttpRequest) // Firefox 
	   xhr_object = new XMLHttpRequest(); 
	else if(window.ActiveXObject) // Internet Explorer 
	   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	else { // XMLHttpRequest non supporté par le navigateur 
	   alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest..."); 
     return; 
	} 
	 
	xhr_object.open("GET","rechercheCommune.php5?debut="+debut,true);
	     
	xhr_object.onreadystatechange = function() { 
	   if(xhr_object.readyState == 4) {
			//alert(xhr_object.responseText); // DEBUG MODE
			//document.write(xhr_object.responseText);
			document.getElementById('recherche').innerHTML=xhr_object.responseText;
			eval(xhr_object.responseText);
		 }

		return xhr_object.readyState;
	} 
	 
	xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	
	xhr_object.send(null);
	}
	else{
	document.getElementById('recherche').style.visibility='hidden';
	}
}