rem: }.extend(options || {}); 
add: } Object.extend(this.options, options || {}); 
context:   setOptions: function(options) {    this.options = {      method:       'post',      asynchronous: true,      parameters:   ''    }.extend(options || {});  },
meta: 2355	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2355/9867ca01ad65827d23c0bf6cc14d8a64137e927d/prototype.js/clean/tracks/public/javascripts/prototype.js