function foto(url)
    {
	var height=screen.height/2-275;
	var width=screen.width/2-250;
      var w=window.open(url,'123',"width=100,height=100,resizable=0,toolbar=0,location=0,status=0,menubar=0,directories=0,scrollbars=no,top=0,left=0");
      w.focus();
    }