return !values.include(value); 
return value != null; 
    return this.select(function(value) {      return !values.include(value);    });
4999	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4999/15b6168787a6a25fd1fbbc41a3a5227b899071a9/prototype.js/clean/wp-includes/js/prototype.js