var cLang = function()
{
    this.lang_code = false;
}

cLang.prototype.set_active_lang = function(lang_code)
{
    this.lang_code = lang_code;
    
    var params = new Array();
    params['s_action'] = 'set_lang';
    params['s_lang_code'] = lang_code;
    call_ajax('lang_state', 'message_box', params); 
}

lang = new cLang();