$(function() {
// OPACITY OF BUTTON SET TO 50%
$("img.a").css("opacity","1.0");
		
// ON MOUSE OVER
$("img.a").hover(function () {
										  
// SET OPACITY TO 100%
$(this).stop().animate({
opacity: "0.7"
}, "slow");
},
		
// ON MOUSE OUT
function () {
			
// SET OPACITY BACK TO 50%
$(this).stop().animate({
opacity: "1.0"
}, "slow");
});
});

$(function() {
// OPACITY OF BUTTON SET TO 50%
$("img.b").css("opacity","0.3");
		
// ON MOUSE OVER
$("img.b").hover(function () {
										  
// SET OPACITY TO 100%
$(this).stop().animate({
opacity: "1.0"
}, "slow");
},
		
// ON MOUSE OUT
function () {
			
// SET OPACITY BACK TO 50%
$(this).stop().animate({
opacity: "0.3"
}, "slow");
});
});