return eval((this.transport.responseText || '').unfilterJSON()); 
return eval(this.transport.responseText); 
  evalResponse: function() {    try {      return eval((this.transport.responseText || '').unfilterJSON());    } catch (e) {      this.dispatchException(e);    }  },
4053	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4053/99db091466168b09f46c79ff71f0e07c7fd4a8db/prototype.js/clean/lib/prototype.js