function popup(img)
	{
	var re = new RegExp("popup-img\.php");
	var nalez = img.search(re);
	
	if (nalez == -1) {
		// nove napsane
		window.open('./img.php?img='+img,'popup','resizable,statusbar=no,scrollbars=yes');		
	} else {
		// stara verze
		window.open(img,'popup','resizable,statusbar=no,scrollbars=yes');		
	}
	return true;
	}