rem: Element.remove(this.form); 
add: if (this.form.parentNode) Element.remove(this.form); 
context:   removeForm: function() {    if(this.form) {      Element.remove(this.form);      this.form = null;    }  },
meta: 287	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/287/7d101d58400acaff232091485c8e140f0a37cbaf/controls.js/buggy/actionpack/lib/action_view/helpers/javascripts/controls.js