add:  this.runtimeAttributes = {}; 
context:       var onStart = function() {         this.onStart.fire();         for (var attr in this.attributes) {            this.setRuntimeAttribute(attr);         }         isAnimated = true;         actualFrames = 0;         startTime = new Date();      };
meta: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/animation.js/buggy/www/resources/yui/animation/animation.js