rem:  Element.show('overlay');  
add: if( this.options.showOverlay ) {  Element.show('overlay'); } 
context: 	showBox : function(){		//show the overlay	   Element.show('overlay');		//center the lightbox	   this.center();	   	   	//show the lightbox	   Element.show(this.element);	   return false;	},
meta: 2938	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2938/b2cd30f4e1c54108bcf6766509191e66505bc59b/lightbox.js/clean/virtuemart/js/lightbox/lightbox.js