Code
<div id="forecast" style="max-width:250px; overflow:auto">
</div>
<script>
var tab_mois=new Array("Jan.", "Fév.", "Mars", "Avr.", "Mai", "Juin", "Juil.", "Août", "Sep.", "Oct.", "Nov.", "Déc.");
var tab_jour=new Array("Dim.", "Lun.", "Mar.", "Mer.", "Jeu.", "Ven.", "Sam.");
var proccessResults2 = function() {
console.log(this);
var results = JSON.parse(this.responseText);
var t_date;
if (results.list.length > 0) {
var forecast_text = 'Ville:<strong>'+results.city.name+'</strong>';
forecast_text += '<table bgcolor="#E0F8F7"><tr>';
for (var i = 0; i < results.list.length; i++) {
var Date_f = new Date(results.list[i].dt*1000);
Date_d = Date_f.getDay();
Date_n = Date_f.getDate();
Date_m = Date_f.getMonth();
forecast_text += "<td style= 'border-right: 1px solid white; border-bottom: 1px solid white;'><center>"+tab_jour[Date_d]+"<br>"+Date_n+"<br>"+tab_mois[Date_m]+"</td></center>";
} // fin du for
forecast_text += '</tr><tr>';
for (var i = 0; i < results.list.length ; i++) {
forecast_text += "<td style= 'border-right: 1px solid white;'><center>";
forecast_text += "<img src=" + "http://openweathermap.org/img/w/"+ results.list[i].weather[0].icon + ".png";
forecast_text += " title=\""+results.list[i].weather[0].description+"\" ><br>";
forecast_text += Math.round(results.list[i].temp.day) + "°C</center></td>";
} // fin du for
forecast_text +='</tr></table>';
// document.write(forecast_text);
var div = document.getElementById("forecast");
div.innerHTML = forecast_text;
} // fin du if
}; // fin fonction
function Appel(City) {
var requestString2 ="http://api.openweathermap.org/data/2.5/forecast/daily?id="+City+"&cnt=15&units=metric&lang=fr&APPID=xxxxxxxxxxx";
request = new XMLHttpRequest();
request.onload = proccessResults2;
request.open("get", requestString2, false);
request.send();
}
function Appel_id() {
d = document.getElementById("liste").value;
// document.write(d);
Appel(d);
}
Appel ("2985034");
</script>
<select id="liste" onchange="return Appel_id()">
<option value="3037044">Argenteuil (95)</option>
<option value="3023763">Corbeil-Essonnes (91)</option>
<option value="3019459">Etampes (91)</option>
<option value="2996148">Mantes-la-Jolie (78)</option>
<option value="2994798">Meaux (77)</option>
<option value="2994651">Melun (77)</option>
<option value="2992090">Montreuil (93)</option>
<option value="2988507">Paris (75)</option>
<option value="2985034" selected="selected">Puteaux (92)</option>
<option value="3421319">Nuuk (Groenland)</option>
<option value="2984513">Rambouillet(78)</option>
<option value="3413829">Rekjavik (Islande)</option>
<option value="2967849">Vitry-sur-Seine (94)</option>
</select>