function canviarIdioma(lang){
 var url = window.location.toString();
 var langOld = url.substr(url.lastIndexOf('/')-3,3);
 //langOld=url.substring(url.lastIndexOf('/')-3,url.lastIndexOf('/'));
 url = url.replace(langOld, lang);
 //alert(url);
 window.location.href = url;
}