rem: this.prev_onchange(); 
add: this.prev_onchange(); 
context:           element.onchange = function() {            this.prev_onchange();             this.target.onElementEvent();          }
meta: 1371	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1371/3f913f897829fb026ef98df2d57f8da94ee5339d/prototype.js/buggy/public/javascripts/prototype.js