return array.include(item); 
return array.detect(function(value) { return item === value }); 
  intersect: function(array) {    return this.uniq().findAll(function(item) {      return array.include(item);    });  },
4053	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4053/b8ec17fb9a9503b3599947de79d66a077d483799/prototype.js/clean/lib/prototype.js