前几天写了左边这个3D球状导航的文章分类，这里对实现细节做个简单记录。

效果：
分类标题呈现3D球状效果，点击分类标题的时候，会弹出这个分类对应的推荐文章列表。
效果截图：




HTML：
复制代码 代码如下:
<div id="mainList">
<div id="list">
<ul>
<li><a class="HTML" onclick="ClickLink(this)" href="#">HTML</a></li>
<li><a class="CSS" onclick="ClickLink(this)" href="#">CSS</a></li>
<li><a class="JS" onclick="ClickLink(this)" href="#">JavaScript</a></li>
<li><a class="AJAX" onclick="ClickLink(this)" href="#">Ajax</a></li>
<li><a class="ASPNET" onclick="ClickLink(this)" href="#">Asp.net</a></li>
<li><a class="CSHARP" onclick="ClickLink(this)" href="#">C#</a></li>
<li><a class="DEBUG" onclick="ClickLink(this)" href="#">Debugging</a></li>
<li><a class="PERF" onclick="ClickLink(this)" href="#">Performance</a></li>
<li><a class="ARCHITERT" onclick="ClickLink(this)" href="#">Architect</a></li>
</ul>
</div>

核心JS:动态生成3D球状云+弹出模式窗体-articlemap.js
复制代码 代码如下:
$(function() {
var element = $('#list a'); ;
var offset = 0;
var stepping = 0.02;
var list = $('#list');
var $list = $(list)
$list.mousemove(function(e) {
var topOfList = $list.eq(0).offset().top
var listHeight = $list.height()
stepping = (e.clientY - topOfList) / listHeight * 0.2 - 0.1;
});
for (var i = element.length - 1; i >= 0; i--) {
element[i].elemAngle = i * Math.PI * 2 / element.length;
}
setInterval(render, 50);
function render() {
for (var i = element.length - 1; i >= 0; i--) {
var angle = element[i].elemAngle + offset;
x = 120 + Math.sin(angle) * 30;
y = 45 + Math.cos(angle) * 40;
size = Math.round(15 - Math.sin(angle) * 15);
var elementCenter = $(element[i]).width() / 2;
var leftValue = (($list.width() / 2) * x / 100 - elementCenter) + "px"
$(element[i]).css("fontSize", size + "pt");
$(element[i]).css("opacity", size / 100);
$(element[i]).css("zIndex", size);
$(element[i]).css("left", leftValue);
$(element[i]).css("top", y + "%");
}
offset += stepping;
}
});
function ClickLink(item) {
var typName = $(item).text();
var links = null;
switch (typName) {
case "HTML":
links = TrainLinks(Links.HTML);
break;
case "CSS":
links = TrainLinks(Links.CSS);
break;
case "JavaScript":
links = TrainLinks(Links.JavaScript);
break;
case "Ajax":
links = TrainLinks(Links.Ajax);
break;
case "Asp.net":
links = TrainLinks(Links.Aspnet);
break;
case "C#":
links = TrainLinks(Links.CSharp);
break;
case "Debugging":
links = TrainLinks(Links.Debugging);
break;
case "Performance":
links = TrainLinks(Links.Performance);
break;
case "Architect":
links = TrainLinks(Links.Architect);
break;
}
CommonHelper.showNoBtnAlert(typName, links);
}
function TrainLinks(arr) {
var links = "这个可以有，暂时还没有！";
if (arr.length > 0) {
links = '<div><ul>';
}
for (i = 0, j = arr.length; i < j; i++) {
links += '<li><a target="_blank" href="' + arr[i][0] + '">' + arr[i][1] + '</a></li>';
}
if (arr.length > 0) {
links += '</ul></div>';
}
return links;
}

辅助存储推荐文章列表的JS（未来通过修改这个文件来维护推荐文章）:
复制代码 代码如下:
var Links = {
HTML: [],
CSS: [["http:///justinw/archive/2009/11/26/1611397.html", "[推荐]前端性能分析工具：dynaTrace Ajax Edition"]
]
}

其他：
这里还引用了jQuery UI的Dialog和一些自定义的CSS设置，具体参考实例即可。
下载源代码