rem: return eval('(' + this.header('X-JSON') + ')'); } catch (e) {} 
add: var json = this.getHeader('X-JSON'); return json ? eval('(' + json + ')') : null; } catch (e) { return null } 
context:   evalJSON: function() {    try {      return eval('(' + this.header('X-JSON') + ')');    } catch (e) {}  },
meta: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/prototype.js/clean/www/resources/prototype/prototype.js