function telephone_choice(f) { var l1 = f.elements["list1"]; var l2 = f.elements["list2"]; var index = l1.selectedIndex; if(index < 1) l2.options.length = 0; else { 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("POST", "query/query_tel.php", true); xhr_object.onreadystatechange = function() { if(xhr_object.readyState == 4) eval(xhr_object.responseText); } xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); var data = "data="+escape(l1.options[index].value)+"&form="+f.name+"&select=list2"; xhr_object.send(data); } }