$(function() {
// OPACITY OF BUTTON SET TO 50%
$(".metro_img").css("opacity","1"); 

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

// SET OPACITY TO 100%
$(this).stop().animate({opacity: 0.7}, "fast", function () { $(this).animate({ opacity: 1.0 }, "slow"); });},

//$(this).stop().animate({ opacity: 0.7 }, "fast", function () { $(this).animate({ opacity: 1.0 }, "slow"); });}, 

// ON MOUSE OUT
function () { 

// SET OPACITY BACK TO 50%
$(this).stop().animate({opacity: 1}, "slow");});});