add: window.opener.prefWindow = 0; 
context: function PREF_oncancel(){  window.close();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/d812af0ba8d8722dc7f436b583a529a8957116cb/pref.js/clean/xpfe/components/prefwindow/resources/content/pref.js