return json ? eval('(' + json + ')') : null; 
return json ? json.evalJSON() : null; 
  evalJSON: function() {    try {      var json = this.getHeader('X-JSON');      return json ? eval('(' + json + ')') : null;    } catch (e) { return null }  },
4999	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4999/e47dfd7529c730bdf42c17407d64892450c0dbee/prototype.js/clean/wp-includes/js/scriptaculous/prototype.js