text: function urlJoin(){
      var args =Array.prototype.slice.call(arguments),
          prefixDoubleSlash = false,
          subdir = getSubdir().replace(/^\/|\/+$/, ''),
          subdirRegex,
          url;
  
      if(args[0] === '') {
          args.shift();
      }
  
      if(args[0].indexOf('//') == 0) {
          prefixDoubleSlash = true;
      }
  
      url = args.join('/');
  
      url = url.replace()
  }