Something

var img_win = '';
function open_pic( path ) {
	if ( img_win.location && !img_win.closed ) {
		img_win.location.href = path; 
		img_win.focus( );
	} else {
		img_win = window.open( path, 'Aquarium - Picture Gallery', 'width=1050, height=770' );
	} 
}
function clean_up( ) {
	if ( img_win.location && !img_win.closed ) {
		img_win.close( );
	}
}