/*!
 * mouseover met fade
 * http://bavotasan.com/2009/creating-a-jquery-mouseover-fade-effect/
 */

$(document).ready(function(){
 
$("img.a, img.b, img.c, img.d").hover(
function() {
$(this).stop().animate({"opacity": "0"}, "slow");
},
function() {
$(this).stop().animate({"opacity": "1"}, "slow");
});
 
});