rem: return eval(this.header('X-JSON')); 
add: return eval('(' + this.header('X-JSON') + ')'); 
context:   evalJSON: function() {    try {      return eval(this.header('X-JSON'));    } catch (e) {}  },
meta: 1782	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1782/a458ebb30ee90b66048c7fd858f5f39957a9be68/prototype.js/clean/webapp/sandbox/scripts/prototype.js