docs: function(script) {
  			if (script.loader !== this) { return script.loader.load(script); }
  
  			Loader.loaded = false;
  			if (this.loaded[script.id]) { return true; }
  			if (this.failed[script.id]) {
  				throw new Error('No such file: ' + script.url);
  			}
  			this.pending[script.id] = script;
  			return false;
  		}