jQuery fadeIn实际上并没有逐渐消失

我有一个jQuery函数，其中某些div会淡入淡出，我无法将整个文件粘贴到jsFiddle中，因为它太大了，所有图像链接都是相对的，但我有以下内容。。。

// On click hide default, Country specific
    $('.default .asia').click(function(){
        $('.default').fadeOut("fast");
        $(".default").queue(function () {
            $('.viewport-asia').fadeIn("fast");
            $('.viewport-asia').dequeue();
        });         
    });
    $('.default .north-america').click(function(){
        $('.default').fadeOut("fast");
        $(".default").queue(function () {
            $('.viewport-america').fadeIn("fast");
            $('.viewport-america').dequeue();
        });
    });
    $('.default .europe').click(function(){
        $('.default').fadeOut("fast");
        $(".default").queue(function () {
            $('.viewport-europe').fadeIn("fast");
            $('.viewport-europe').dequeue();
        });
    });
    // Drag event
    $(".america-big").draggable();
    $(".europe-big").draggable();
    $(".asia-big").draggable();
    // Reset map
    $('a.zoom-out').click(function(){
        $('.hidden').fadeOut("fast");
        $(".hidden").queue(function () {
            $('.default').fadeIn("fast");
            $('.hidden').dequeue();
        }); 
    })
}); 

最后一个函数//Reset Map"a.zoom-out"应该淡出当前div并淡出.defaultdiv，它当前淡出当前div，但默认div没有淡出？

有人看到我哪里出错了吗？

HTML

<div class="map">
    <!-- // Default Map -->
    <div class="default">
        <div class="asia"><img src="map/asia.png" alt="Asia"></div>
        <div class="north-america"><img src="map/north-america.jpg" alt="America"></div>
        <div class="europe"><img src="map/europe.jpg" alt="Europe"></div>
    </div>
    <!-- // Animated Map // North America -->
    <div class="viewport-america hidden">
        <div class="compass">
            <a href="#" class="arrow top">Top</a>
            <a href="#" class="arrow right">Right</a>
            <a href="#" class="arrow bottom">Bottom</a>
            <a href="#" class="arrow left">Left</a>
        </div>
        <a href="#" class="zoom-out">Zoom Out</a>
        <div class="instructions"><img src="map/instructions.png" alt="Instructions"></div>
        <div class="america-big"><img src="http://placekitten.com/1989/996" alt="America" /></div>
    </div>
    <!-- // Animated Map // Europe -->
    <div class="viewport-europe hidden">
        <div class="compass">
            <a href="#" class="arrow top">Top</a>
            <a href="#" class="arrow right">Right</a>
            <a href="#" class="arrow bottom">Bottom</a>
            <a href="#" class="arrow left">Left</a>
        </div>
        <a href="#" class="zoom-out">Zoom Out</a>
        <div class="instructions"><img src="map/instructions.png" alt="Instructions"></div>
        <div class="europe-big"><img src="http://placekitten.com/2000/1000" alt="Europe" /></div>
    </div>
    <!-- // Animated Map // Asia -->
    <div class="viewport-asia hidden">
        <div class="compass">
            <a href="#" class="arrow top">Top</a>
            <a href="#" class="arrow right">Right</a>
            <a href="#" class="arrow bottom">Bottom</a>
            <a href="#" class="arrow left">Left</a>
        </div>
        <a href="#" class="zoom-out">Zoom Out</a>
        <div class="instructions"><img src="map/instructions.png" alt="Instructions"></div>
        <div class="asia-big"><img src="http://placekitten.com/1999/999" alt="Asia" /></div>
    </div>
</div>