rem: filter = filterResource.GetDelegate("filter", Components.interfaces.nsIMsgFilter); 
add: var filter = filterResource.GetDelegate("filter", Components.interfaces.nsIMsgFilter); 
context: function onToggleEnabled(event){    var item = event.target;    while (item && item.localName != "treeitem") {        lastItem = item;        item = item.parentNode;    }        var filterResource = rdf.GetUnicodeResource(item.id);    filter = filterResource.GetDelegate("filter",                                        Components.interfaces.nsIMsgFilter);    filter.enabled = !filter.enabled;    refreshFilterList();}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/7614bb88343d71be0c36dd08f5641abb713891cd/FilterListDialog.js/clean/mailnews/base/search/resources/content/FilterListDialog.js