用jquery显示一个块，同时隐藏其他块.当点击部分中的每个块时，会出现第二个块、第三个块，然后是第四个块

我想制作一个4个块的导航菜单，而我已经显示了一个块，然后点击打开第二个块，从第二个开始你选择并再次点击出现第三个块，第四个块也是如此。。。这是我的代码，如果能工作会很高兴，但它不是…：(请提供帮助和建议。谢谢您可以在下面或下一个链接中查看代码：http://jsfiddle.net/9afaF/

<div class="games_content">
            <script>
                $(function() {
                    $("#block_2 div,#block_3 div,#block_4 div").hide();
                    $("#block_1 div").click(function(){
                        $("#block_2 div,#block_3 div,#block_4 div").hide();
                        $("#block_2 div."+$(this).attr('id')).show("fast");
                        $("#block_2 div").click(function(){
                            $("#block_3 div,#block_4 div").hide();
                            $("#block_3 div."+$(this).attr('id')).show("fast");
                            $("#block_3 div").click(function(){
                                $("#block_4 div").hide();
                                $("#block_4 div."+$(this).attr('id')).show("fast");
                            })
                        });
                    });
                });
            </script>
            <div style="float:left;width:237px;height:420px;background: rgba(255, 0, 0, .5);margin-right:15px;" id="block_1">
                <div id="category1">Category 1</div>
                <div id="category2">Category 2</div>
                <div id="category3">Category 3</div>
                <div id="category4">Category 4</div>
                <div id="category5">Category 5</div>
            </div>
            <div style="float:left;width:164px;height:500px;background: rgba(255, 0, 0, .5);margin-right:2px;margin-top:10px;margin-left:4px;" id="block_2">
                <div class="category1" id="subcat1">Sub Category 1</div>
                <div class="category1" id="subcat2">Sub Category 2</div>
                <div class="category1" id="subcat3">Sub Category 3</div>
                <div class="category2" id="subcat4">Sub Category 4</div>
                <div class="category2" id="subcat5">Sub Category 5</div>
                <div class="category3" id="subcat6">Sub Category 6</div>
                <div class="category3" id="subcat7">Sub Category 7</div>
                <div class="category4" id="subcat8">Sub Category 8</div>
                <div class="category4" id="subcat9">Sub Category 9</div>
                <div class="category5" id="subcat10">Sub Category 10</div>
                <div class="category5" id="subcat11">Sub Category 11</div>
            </div>
            <div style="float:left;width:160px;height:500px;background: rgba(255, 0, 0, .5);margin-right:2px;margin-top:10px;" id="block_3">
                <div class="subcat1" id="game1">Sub Sub Categoey 1</div>
                <div class="subcat1" id="game2">Sub Sub Categoey 2</div>
                <div class="subcat2" id="game3">Sub Sub Categoey 3</div>
                <div class="subcat2" id="game4">Sub Sub Categoey 4</div>
                <div class="subcat3" id="game5">Sub Sub Categoey 5</div>
                <div class="subcat4" id="game6">Sub Sub Categoey 6</div>
            </div>
            <div style="float:left;width:240px;height:400px;background: rgba(255, 0, 0, .5);margin-left:17px;" id="block_4">
                <div class="game1">Game1</div>
                <div class="game2">Game2</div>
                <div class="game3">Game3</div>
                <div class="game4">Game4</div>
            </div>