CSS Spite技术：也就是CSS精灵技术，实际上CSS的精灵就是图片里的一个个的图标元素，这些图标可以使按钮、标签以及logo等等。很多网站中都应用了该技术，可有效减少传输请求次数，所需要的图标汇总在一张图片中，一次下载即可整个页面应用
以下示例主要是CSS精灵技术的应用，直接Po代码：
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>酷狗电台列表设计</title> <style> #frm{ margin:0; padding:0; list-style-type: none; width: 500px; border:1px solid #000; overflow: hidden; } #frm *{ margin:0; padding: 0; font-size: 12px; } #frm li{ padding:4px 0; width: 47%; float: left; margin:5px 15px 5px 0; cursor: pointer; } #frm li span{ color:#999; position: relative; } #frm li .d{ width: 38px; height: 38px; float: left; margin:0px 12px 6px 0; background-image: url(img/spite2.jpg); position: relative; } #frm li .cont{ position: relative; height: 37px; overflow: hidden; } .cont div{ margin:5px 0 5px 0; } .d div{ position: absolute; width: 100%; height: 100%; } .d .img,.d .play{ background-image: url(img/spite2.jpg); } .l1 .d .img{ background-position: 38px 0; } .l2 .d .img{ background-position: 76px 0; } .l3 .d .img{ background-position: 114px 0; } .l4 .d .img{ background-position: 152px 0; } .l5 .d .img{ background-position: 190px 0; } .l6 .d .img{ background-position: 228px 0; } .l7 .d .img{ background-position: 266px 0; } .l8 .d .img{ background-position: 304px 0; } .l9 .d .img{ background-position: 342px 0; } .ll .d .img{ background-position: 380px 0; } .d .mask,.d .play{ visibility: hidden; } .choose .d{ background-position: 38px 0; outline: 1px solid rgb(233,243,250); } .choose .d .mask{ background-color: #000; filter:alpha(Opacity=50); opacity: 0.5; height: 32px; width: 32px; top:3px; left: 3px; visibility: visible; } .choose .d .play{ background-position: 418px 0; visibility: visible; } .choose .cont div{ font-weight: bold; color:rgb(0,155,250); } </style> <script> function mouseoverhandle(obj){ obj.className += ' choose'; } function mouseouthandle(obj){ obj.className = obj.className.substring(0,2); } </script></head><body><ul id="frm"> <li class="l1" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>酷狗热歌</div> <span href="#">徐朗 - 小夜曲</span> </div> </li> <li class="l2" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>DJ热碟</div> <span href="#">曾春年 - 最幸福的人</span> </div> </li> <li class="l3" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>网络红歌</div> <span href="#">徐志强 - 想你的时候</span> </div> </li> <li class="l4" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>新歌</div> <span href="#">孙俪 - 美丽信号</span> </div> </li> <li class="l5" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>经典</div> <span href="#">游鸿明 - 寻你</span> </div> </li> <li class="l6" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>怀旧粤语</div> <span href="#">陈慧娴 - 人生何处不相逢</span> </div> </li> <li class="l7" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>钢琴</div> <span href="#">July - My Soul</span> </div> </li> <li class="l8" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>KTV必点</div> <span href="#">蔡健雅 - 无底洞</span> </div> </li> <li class="l9" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>思念</div> <span href="#">张杰 - 这就是爱</span> </div> </li> <li class="ll" onmouseover="mouseoverhandle(this)" onmouseout="mouseouthandle(this)"> <div class="d"> <div class="img"></div> <div class="mask"></div> <div class="play"></div> </div> <div class="cont"> <div>DJ外文舞曲</div> <span href="#">Jean Cloud Ades</span> </div> </li></ul><script> var ul = document.getElementById('frm'); var li = document.getElementsByTagName('li'); var spans; for(var i=0;i<li.length;i++){ spans = li[i].getElementsByTagName('span'); li[i].span_obj = spans[0]; } var index = -1; function showup(){ if(li[index].span_obj.style.top == ''){ li[index].span_obj.style.top = '13px'; } if(parseInt(li[index].span_obj.style.top)<=0){ li[index].span_obj.style.top = ''; setTimeout('shownext()',1000); }else{ li[index].span_obj.style.top = parseInt(li[index].span_obj.style.top)-1 +'px'; setTimeout('showup()',100); } } function shownext(){ index++; index = index%li.length; showup(); } setTimeout(shownext,1000);</script></body></html>生成效果：
代码分析：
1.ul标签内部含有10个li标签，因为每个li标签的图标为不同的子图片，所以给每个li标签里添加不同的class属性。
2.每个li标签的class属性为d的div标签里面包含了3个div标签，它们的class属性为img、mask和play，这三个标签依次为主题图标、遮罩图标和播放图标，而他们的父节点div(class属性为d)以背景图片作为边框。
3.每个li标签都添加了onmouseover以及onmouseout事件响应函。
4.最后面一段js代码是模拟音乐盒歌曲切换时的歌曲名上升的效果。
首先程序获取id为frm的标签，并获取该标签的所有li子标签，同时获取所有li的span标签，并绑定第一个span标签到li标签对象的span_obj上。
两个超时函数：shownext()以及showup()，其中showup()函数负责产生歌名升起效果，而函数shownext()负责切换到下一个音乐台的歌曲的播放。
对象的方法内部不可以设置自身为超时函数
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