nn4=(document.layers) ? true : false; 
ie4=(document.all) ? true : false; 
_win=null; 


function popUp(i_id) { 
	if (_win) 
	{
 		if (ie4) _win.close(); 
 		else if (nn4) _win.closed; 
 			_win=null 
 	}; 
 
	_win=window.open("gallery.php?id="+i_id,"","width=900,height=700,resizable,scrollbars=yes"); 
	_win.focus() 
}