// pas touche
 // création de l'objet Ajax
 var http = null;
 if (window.XMLHttpRequest) // Firefox
 http = new XMLHttpRequest();
 else if (window.ActiveXObject) // Internet Explorer
 http = new ActiveXObject("Microsoft.XMLHTTP");
 else // XMLHttpRequest non supporté par le navigateur
 alert("Votre navigateur ne supporte pas les objets XMLHTTPRequest...");


 function recup_email(e) {
 var sel = document.completion_form.completion_select ;
 var nb_el = sel.options.length ;
 var selIndex = sel.selectedIndex ;

 if (!document.completion_form.completion_text.value)
 { sel.style.display = 'none';
 }
 else if (e.keyCode == 40 && nb_el) { // fleche bas
 if (selIndex < sel.options.length - 1)
 sel.selectedIndex = selIndex + 1 ;
 }
 else if (e.keyCode == 38 && nb_el) { // fleche haut
 if (selIndex > 0)
 sel.selectedIndex = selIndex - 1 ;
 }
 else if (e.keyCode == 13 && nb_el) { // entrée
 document.completion_form.completion_text.value = sel.options[selIndex].value ;
 sel.style.display = 'none';
 }
 else { // autre touche --> on recherche les emails
 val = document.completion_form.completion_text.value ;
 if (val.length >= minimum_caractere) {
 http.open("GET", "ajax.php?what=completion1&case="+case_sensitive+"&val="+escape(val), true);
 http.onreadystatechange = handleHttpResponse_recup_email;
 http.send(null);
 }
 }
 }

 function handleHttpResponse_recup_email()
 {
 if (http.readyState == 4)
 { emails = eval('(' + http.responseText + ')'); // [id1,id2, ...]

 var sel = document.completion_form.completion_select ;
 sel.attributes['size'].value = emails.length;

 // on vide le select
 while(sel.options.length > 0)
 sel.options[0] = null

 // on rempli avec les nouveaux emails
 for(i=0 ; i<emails.length ; i++)
 sel.options[sel.options.length] = new Option(emails[i],emails[i]);

 if (sel.options.length) {
 sel.selectedIndex = 0 ; // on selection le premier element de la liste
 sel.style.display = 'block';
 }
 else
 sel.style.display = 'none';
 }
 }

 function recup_mail_click() {
 var sel = document.completion_form.completion_select ;
 document.completion_form.completion_text.value = sel.options[sel.selectedIndex].value ;
 sel.style.display = 'none';
 }