DIV+CSS电台列表设计代码

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>

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);

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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