if (!this.useNav) { return; } if (this.navShowing) { this.hideNav(); } else { this.showNav(); } 
if(!this.useNav){ return; } if(this.navShowing){ this.hideNav(); }else{ this.showNav(); } 
	toggleNav: function() {		// summary: toggle navigation visibility		if (!this.useNav) { return; } 		if (this.navShowing) { this.hideNav(); } else { this.showNav(); } 	},
5168	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5168/5034d020c981e60058fc1448992238b937f9cf86/SlideShow.js/buggy/presentation/SlideShow.js