add: this.isContentSelected = this.isContentSelection(); 
context:     initMenu : function ( popup ) {        // Save menu.        this.menu = popup;        // Get contextual info.        this.setTarget( document.popupNode );                this.isTextSelected = this.isTextSelection();        // Initialize (disable/remove) menu items.        this.initItems();    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/fc1a4dabdf3db80cf82a1743dae8d37374544a0a/browser.js/buggy/browser/base/content/browser.js