function change_lang(lang) 
{
    var parts = document.location.hostname.split('.');
    return document.location.protocol + "//www." + parts[parts.length - 2] + "." + lang + document.location.pathname;
 }
 function change_lang_sub(lang) {
     var parts = document.location.hostname.split('.');
     return document.location.protocol + "//" + lang + "." + parts[parts.length - 2] + ".com" + document.location.pathname;
 }

 function change_domain(lang) {
     if (lang === "cn")
         return document.location.protocol + "//www.acfx-china.com" + document.location.pathname;
     else if (lang === "com") {
         return document.location.protocol + "//www.acfx.com" + document.location.pathname;
     }
     else {
         var parts = document.location.hostname.split('.');
         return document.location.protocol + "//" + lang + ".acfx.com" + document.location.pathname;
     }     
 }