rem: this.prev_onchange(); 
add: this.prev_onchange(); 
context:           element.onchange = function() {            this.prev_onchange();             this.target.onElementEvent();          }
meta: 2930	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2930/9867ca01ad65827d23c0bf6cc14d8a64137e927d/prototype.js/buggy/tracks/public/javascripts/prototype.js