this.each(function(object) { var value = Object.toJSON(object); if (value !== undefined) results.push(value); 
return this.select(function(value) { return value != null; 
    this.each(function(object) {      var value = Object.toJSON(object);      if (value !== undefined) results.push(value);    });
6462	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6462/0097375444aef03d8cdcdbe6705c1ea088b9b188/prototype.js/buggy/wp-includes/js/prototype.js