http://www.laboratorioadolescenza.org/iwetc/res/js/i18n.js?v=2

1function IwI18n(locale) {
2  this.locale=locale;
3  this.obj=new Array();
4}
5IwI18n.prototype.put = function(key,value) {
6  this.obj[key]=value;
7}
8IwI18n.prototype.get = function(key,params) {
9  var value=this.obj[key];
10  if (value==null) {
11    value=key;
12    this.obj[key]=key;
13    var numParams=params==null?0:params.length;
14    if (numParams!=0) {
15      value+="(";
16      for (var i=0;i<numParams;i++) {
17        value+="{"+i+"}";
18        if (i<numParams-1) {
19          value+=",";
20        }
21      }
22      value+=")";
23    }
24    var ajax=new IwAjax();
25    ajax.loadXmlDoc('/iwetc/utils/i18n/newObject.jsp?dirty=true&key='+escape(key)+'&numParams='+numParams);
26  }
27  if (params!=null) {
28    value=this.applyParams(value,params);
29  }
30  return value;
31}
32IwI18n.prototype.alert = function(value,params) {
33  alert(this.get(value,params));
34}
35IwI18n.prototype.confirm = function(value,params) {
36  return confirm(this.get(value,params));
37}
38IwI18n.prototype.applyParams = function(value,params) {
39  for (var i=0;i<params.length;i++) {
40    value=value.replace('{'+i+'}',''+params[i]);
41  }
42  return value;
43}