window.addEvent('domready', function() {
  $$('.photoClass').each(function(photoCl) {
    photoCl.addEvent('mouseenter', function(e) {
	  $('imageOver').tween("opacity", [0,0.7]);
	  e.stop();
    });
    photoCl.addEvent('mouseleave', function(e) {
      $('imageOver').tween("opacity", [0.7,0]);
	  e.stop();
    });
  });
});

window.addEvent('domready', function() {
  $$('.imageOverClass').each(function(photoCl) {
    photoCl.addEvent('mouseenter', function(e) {
      $('imageOver').tween("opacity", [0,0.7]);
	  e.stop();
    });
    photoCl.addEvent('mouseleave', function(e) {
      $('imageOver').tween("opacity", [0.7,0]);
	  e.stop();
    });
  });
});