$(function() {
// OPACITY OF BUTTON SET TO 50%
$(".fade").css("opacity","0.50");

// ON MOUSE OVER
$(".shop_cat a").hover(function () {

// SET OPACITY TO 100%
$(this).children(".fade").stop().animate({
opacity: 1.0
}, "slow");
},
 
// ON MOUSE OUT
function () {

// SET OPACITY BACK TO 50%
$(this).children(".fade").stop().animate({
opacity: 0.50
}, "slow");
});
});