rem: fragments.reverse(false).each((function(fragment) { this.element.insertBefore(fragment, this.element.firstChild); }).bind(this)); 
add: return properties.inject(dim, function(memo, property) { var val = proceed(element, property); return val === null ? memo : memo - parseInt(val, 10); }) + 'px'; 
context:     fragments.reverse(false).each((function(fragment) {      this.element.insertBefore(fragment, this.element.firstChild);    }).bind(this));
meta: 8434	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/8434/6873fc8026e87544ee93e0d9551ae57083313cff/prototype.js/buggy/vendor/rails/actionpack/lib/action_view/helpers/javascripts/prototype.js