add: window.opener.prefWindow = 0; 
context: function PREF_oncancel(){  window.close();}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/c96f0ef3f845f0395582fd3d897563c62dab730a/pref.js/buggy/xpfe/components/prefwindow/resources/content/pref.js