this.popup.feature = null; this.popup.destroy() 
if (this.popup) { this.popup.feature = null; this.popup.destroy(); this.popup = null; } 
    destroyPopup: function() {        this.popup.feature = null;        this.popup.destroy()     },
2032	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2032/b9a04a0e9b37c58dc74bdbaac24de7ef3561c3de/Feature.js/clean/lib/OpenLayers/Feature.js