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jacascript 原生选项卡插件

前言:这是笔者学习之后自己的理解与整理。如果有错误或者疑问的地方,请大家指正,我会持续更新!

一直以来没自己写过插件,今天写个简单的面向对象的选项卡,发现了很多问题:

  1. var that = this; 的时候忘记加 var;
  2. setInterval 的用法不是很熟练;
  3. 写完插件,必须得实例化2个以上多次检查,上面两个问题查了我很长时间;

 

在布局的时候,想到了很多以前看到过的案例,再次熟悉一下:

  1. a链接之间的竖线:可以用a链接的border-right/left;  也可以直接 | ;还可以再加个行内元素,用它的border-right/left,
  2. 我这里在a链接之间加了个i,在结尾处有1px的误差,以后再处理;
  3. a链接(行内元素)之间的间隙,可以用浮动解决; 也可以把元素的首尾互相连接;
  4. 某一板块,不论点击哪里都会跳转:可以直接用a链接包住;也可以用a链接遮罩;

 

代码都写在一起,很乱,命名也不规范,还有很多不足;

第一种原型是直接写的,第二种原型是字面对象的;

继续学习下用立即函数的写法,以后在贴上来;

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>选项卡原生插件</title>
        <style type="text/css">
            /*重置样式*/
            *{
                padding: 0;
                margin: 0;
            }
            body{
                font: 14px/100% arial,"Hiragino Sans GB","Hiragino Sans GB W3";
            }
            li{
                list-style: none;
            }
            a{
                color: #333;
                text-decoration: none;
            }
            .clearfix:before, /*:before处理margin上下重叠*/
            .clearfix:after {
                content: ""; 
                display: table;
            }
            .clearfix:after {
                clear: both;
            }
            .clearfix {
                zoom: 1;
            }
            
            /*选项卡样式*/
            .tab_wrapper_test1,.tab_wrapper_test2{
                width: 480px;
                height: 400px;
                margin: 50px auto;
                border: 1px solid #ccc;
                position: relative;
            }
            .prev,.next{
                width: 30px;
                height: 30px;
                background: rgba(0,0,0,0.3);
                position: absolute;
                z-index: 999;
                top: 190px;
                color: #fff;
                text-align: center;
                line-height: 30px;
                font-weight: bold;
                font-size: 18px;
                font-family: SimSun, Arial;
            }
            .prev{
                left: 15px;
            }
            .next{
                right: 15px;
            }
            .tab_menu{
                font-size: 18px;
                height: 49px;
                margin-right: -1px;
                border-bottom: 1px solid #ccc;
                overflow: hidden;
            }
            .tab_menu a{
                display: inline-block;
                text-align: center;
                line-height: 50px;
                padding: 0 10px;
                width: 39px;
            }
            .border_right{
                border-right: 1px solid #ccc;
            }
            .menu_active{
                background: #0ff;
            }
            .tab_content{
                height: 350px;
            }
            .tab_con_item{
                display: none;
            }
            .con_active{
                display: block;
            }
            /*第一页*/
            .tab_con_href_half{
                display: block;
                text-align: center;
                height: 310px;
                line-height: 310px;
            }
            .tab_con_href_half img{
                max-width: 100%;
                vertical-align: middle;
            }
            .tab_con_txt_half{
                border-top: 1px solid #ccc;
                height: 39px;
                text-align: center;
                line-height: 40px;
                font-size: 18px;
            }
            /*第二页*/
            .tab_con_href_all{
                display: block;
                text-align: center;
                overflow: hidden;
            }
            .tab_con_href_all img{
                height: 350px;
            }
            .tab_con_txt_all{
                position: absolute;
                bottom: 0;
                height: 39px;
                width: 100%;
                /*绝对定位之后,可以用width:100%,来扩宽,然后text-align:center; 水平居中*/
                text-align: center;
                line-height: 40px;
                font-size: 18px;
                background: rgba(0,0,0,0.6);
            }
            .tab_con_txt_all a{
                color: #fff;
            }
            /*第三页、第四页、第五页*/
            .tab_con_href_mask_li{
                text-align: center;
                height: 350px;
                position: relative;
            }
            .tab_con_href_mask_img{
                height: 310px;
                line-height: 310px;
                overflow: hidden;
            }
            .tab_con_href_mask_img img{
                max-width: 100%;
                vertical-align: middle;
            }
            .tab_con_mask_txt{
                border-top: 1px solid #ccc;
                height: 39px;
                text-align: center;
                line-height: 40px;
                font-size: 18px;
            }
            .tab_con_href_mask{
                position: absolute;
                display: block;
                width: 100%;
                height: 350px;
                top: 0;
                left: 0;
                z-index: 998;
            }
            /*第四页*/
            .tab_con_href_mask_img_4{
                height: 350px;
                overflow: hidden;
            }
            .tab_con_href_mask_img_4 img{
                height: 350px;
            }
            .tab_con_mask_txt_4{
                position: absolute;
                bottom: 0;
                width: 100%;
                background: rgba(0,0,0,0.6);
                text-align: center;
                border-top: 1px solid #ccc;
                height: 39px;
                line-height: 40px;
                font-size: 18px;
            }
            .tab_con_mask_txt_4 a{
                color: #fff;
            }
        </style>
    </head>
    <body>
        <div class="tab_wrapper_test1">
            <div class="tab_menu">
                <a href="javascript:;" class="menu_active">热点
                </a><i class="border_right"></i><a href="javascript:;">社会
                </a><i class="border_right"></i><a href="javascript:;">娱乐
                </a><i class="border_right"></i><a href="javascript:;">军事
                </a><i class="border_right"></i><a href="javascript:;">体育
                </a><i class="border_right"></i><a href="javascript:;">财经
                </a><i class="border_right"></i><a href="javascript:;">汽车
                </a><i class="border_right"></i><a href="javascript:;">游戏</a>
                <!--这里的i是那个a之间的竖线,可以用a的border-right做,也可以直接写个| -->
                <!--inline-block之间有间隙,解决方法有:压缩代码、浮动、标签前后折叠-->
            </div>
            <div class="tab_content">
                <ul>
                    <li class="tab_con_item con_active">
                        <!--这里我用了3种方式写最外层的a链接-->
                        <a href="javascript:;" class="tab_con_href_half">
                            <!--a链接只包住图片-->
                            <img src="images/1.jpg" title="girl" alt="girl"/>
                        </a>
                        <div class="tab_con_txt_half">
                            <a href="javascript:;">美丽女孩人人爱</a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <a href="javascript:;" class="tab_con_href_all">
                            <!--a链接只包住所有-->
                            <img src="images/cat.jpeg" title="cat" alt="cat"/>
                            <div class="tab_con_txt_all">
                                <a href="javascript:;">可爱猫咪</a>
                            </div>
                        </a>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img">
                                <img src="images/xiaoxin.gif" title="蜡笔小新" alt="蜡笔小新"/>
                            </div>
                            <div class="tab_con_mask_txt">
                                <a href="javascript:;">动感超人biu biu</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/2.jpg" title="帅哥" alt="帅哥"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">帅男</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>                    
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat2.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat.jpeg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                </ul>
            </div>
            <!--这里的箭头可以用图片,也可以用纯css代码,也可以用转义字符+SimSun字体-->
            <a href="javscript:;" class="prev">&lt;</a>
            <a href="javscript:;" class="next">&gt;</a>
        </div>
        
        <div class="tab_wrapper_test2">
            <div class="tab_menu">
                <a href="javascript:;" class="menu_active">热点
                </a><i class="border_right"></i><a href="javascript:;">社会
                </a><i class="border_right"></i><a href="javascript:;">娱乐
                </a><i class="border_right"></i><a href="javascript:;">军事
                </a><i class="border_right"></i><a href="javascript:;">体育
                </a><i class="border_right"></i><a href="javascript:;">财经
                </a><i class="border_right"></i><a href="javascript:;">汽车
                </a><i class="border_right"></i><a href="javascript:;">游戏</a>
                <!--这里的i是那个a之间的竖线,可以用a的border-right做,也可以直接写个| -->
                <!--inline-block之间有间隙,解决方法有:压缩代码、浮动、标签前后折叠-->
            </div>
            <div class="tab_content">
                <ul>
                    <li class="tab_con_item con_active">
                        <!--这里我用了3种方式写最外层的a链接-->
                        <a href="javascript:;" class="tab_con_href_half">
                            <!--a链接只包住图片-->
                            <img src="images/1.jpg" title="girl" alt="girl"/>
                        </a>
                        <div class="tab_con_txt_half">
                            <a href="javascript:;">美丽女孩人人爱</a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <a href="javascript:;" class="tab_con_href_all">
                            <!--a链接只包住所有-->
                            <img src="images/cat.jpeg" title="cat" alt="cat"/>
                            <div class="tab_con_txt_all">
                                <a href="javascript:;">可爱猫咪</a>
                            </div>
                        </a>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img">
                                <img src="images/xiaoxin.gif" title="蜡笔小新" alt="蜡笔小新"/>
                            </div>
                            <div class="tab_con_mask_txt">
                                <a href="javascript:;">动感超人biu biu</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/2.jpg" title="帅哥" alt="帅哥"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">帅男</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>                    
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat2.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat.jpeg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                </ul>
            </div>
            <!--这里的箭头可以用图片,也可以用纯css代码,也可以用转义字符+SimSun字体-->
            <a href="javscript:;" class="prev">&lt;</a>
            <a href="javscript:;" class="next">&gt;</a>
        </div>
        
        <script type="text/javascript">
            window.onload = function(){
                function TabControl(obj){
                    //选项卡菜单控制部分
                    this.oMenu = obj.getElementsByClassName(tab_menu)[0];
                    this.menuItem = this.oMenu.getElementsByTagName(a);
                    //前后控制按钮
                    this.prev = obj.getElementsByClassName(prev)[0];
                    this.next = obj.getElementsByClassName(next)[0];
                    //选项卡内容部分
                    this.con = obj.getElementsByClassName(tab_content)[0];
                    this.conItem = this.con.getElementsByClassName(tab_con_item);
                    
                    //变量设置
                    //选项卡页数
                    this.count = this.conItem.length;
                    //当前第几页,默认为第一页,也就是0
                    this.current = 0;
                    //这里不要忘了var
                    var that = this;
                    
                    
                    //原型方法
                    //构造函数执行到这里的时候,会判断实例是否有menuSwitch方法,
                    //第一次执行构造函数时,实例是没有menuSwitch方法的,就执行if方法块的代码;
                    //之后再执行此构造函数时,原型上已经有这个方法了,就不会进入
                    //原型上的方法有很多,但是只用检测一个就行了,没必要都检测
                    if(typeof this.menuSwitch != function){
                        //菜单控制
                        TabControl.prototype.menuSwitch = function(){
                            //清空所有class名
                            for(var j = 0;j < this.count; j++){
                                this.menuItem[j].className = ‘‘;
                                this.conItem[j].className = tab_con_item;
                            }
                            //给当前页添加class名
                            this.menuItem[this.current].className = menu_active;
                            this.conItem[this.current].className = tab_con_item con_active;
                        };
                        
                        //前按钮控制
                        TabControl.prototype.btnPrevSwitch = function(){
                            if(this.current > 0){
                                //清空前页class名
                                this.menuItem[this.current].className = ‘‘;
                                this.conItem[this.current].className = tab_con_item;
                                //页数自减1
                                this.current--;
                                //当前页添加class名
                                this.menuItem[this.current].className = menu_active;
                                this.conItem[this.current].className = tab_con_item con_active;
                            }else if(this.current == 0){
                                //清空前页class名
                                this.menuItem[this.current].className = ‘‘;
                                this.conItem[this.current].className = tab_con_item;
                                //页数跳转至最后一页
                                this.current = this.count-1;
                                //当前页添加class名
                                this.menuItem[this.current].className = menu_active;
                                this.conItem[this.current].className = tab_con_item con_active;
                            }
                        };
                        
                        //后按钮控制
                        TabControl.prototype.btnNextSwitch = function(){
                            if(this.current < this.count-1){
                                //清空前页class名
                                this.menuItem[this.current].className = ‘‘;
                                this.conItem[this.current].className = tab_con_item;
                                //页数自增1
                                this.current++;
                                //当前页添加class名
                                this.menuItem[this.current].className = menu_active;
                                this.conItem[this.current].className = tab_con_item con_active;
                            }else if(this.current == this.count-1){
                                //清空前页class名
                                this.menuItem[this.current].className = ‘‘;
                                this.conItem[this.current].className = tab_con_item;
                                //页数跳转至第一页
                                this.current = 0;
                                //当前页添加class名
                                this.menuItem[this.current].className = menu_active;
                                this.conItem[this.current].className = tab_con_item con_active;
                            }
                        };
                    }
                    
                    
                    //菜单控制事件
                    for(var i = 0; i < this.count; i++){
                        //设置当前索引,这种设置方法需掌握
                        this.menuItem[i].index = i;
                        this.menuItem[i].onclick = function(){
                            that.current = this.index;
                            that.menuSwitch();
                        }
                    }
                    //前按钮控制
                    this.prev.onclick = function(){
                        that.btnPrevSwitch();
                    } 
                    //后按钮控制
                    this.next.onclick = function(){
                        that.btnNextSwitch();
                    } 
                    
                    //自循环
                    var autoTimer = null;
                    //直接执行
                    autoTimer = setInterval(function(){
                        that.btnNextSwitch();
                    },2000);
                    //进入选项卡,清空计时器
                    obj.onmouseover = function(){
                        clearInterval(autoTimer);
                    }
                    //离开选项卡,计时器开始工作
                    obj.onmouseout = function(){
                        autoTimer = setInterval(function(){
                            that.btnNextSwitch();
                        },2000);
                    }
                }
                
                var oTab1 = document.getElementsByClassName(tab_wrapper_test1)[0];
                var tab1 = new TabControl(oTab1);
                
                var oTab2 = document.getElementsByClassName(tab_wrapper_test2)[0];
                var tab2 = new TabControl(oTab2);            
            }
        </script>
    </body>
</html>

第二种,原型是字面对象

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>选项卡原生插件</title>
        <style type="text/css">
            /*重置样式*/
            *{
                padding: 0;
                margin: 0;
            }
            body{
                font: 14px/100% arial,"Hiragino Sans GB","Hiragino Sans GB W3";
            }
            li{
                list-style: none;
            }
            a{
                color: #333;
                text-decoration: none;
            }
            .clearfix:before, /*:before处理margin上下重叠*/
            .clearfix:after {
                content: ""; 
                display: table;
            }
            .clearfix:after {
                clear: both;
            }
            .clearfix {
                zoom: 1;
            }
            
            /*选项卡样式*/
            .tab_wrapper_test1,.tab_wrapper_test2{
                width: 480px;
                height: 400px;
                margin: 50px auto;
                border: 1px solid #ccc;
                position: relative;
            }
            .prev,.next{
                width: 30px;
                height: 30px;
                background: rgba(0,0,0,0.3);
                position: absolute;
                z-index: 999;
                top: 190px;
                color: #fff;
                text-align: center;
                line-height: 30px;
                font-weight: bold;
                font-size: 18px;
                font-family: SimSun, Arial;
            }
            .prev{
                left: 15px;
            }
            .next{
                right: 15px;
            }
            .tab_menu{
                font-size: 18px;
                height: 49px;
                margin-right: -1px;
                border-bottom: 1px solid #ccc;
                overflow: hidden;
            }
            .tab_menu a{
                display: inline-block;
                text-align: center;
                line-height: 50px;
                padding: 0 10px;
                width: 39px;
            }
            .border_right{
                border-right: 1px solid #ccc;
            }
            .menu_active{
                background: #0ff;
            }
            .tab_content{
                height: 350px;
            }
            .tab_con_item{
                display: none;
            }
            .con_active{
                display: block;
            }
            /*第一页*/
            .tab_con_href_half{
                display: block;
                text-align: center;
                height: 310px;
                line-height: 310px;
            }
            .tab_con_href_half img{
                max-width: 100%;
                vertical-align: middle;
            }
            .tab_con_txt_half{
                border-top: 1px solid #ccc;
                height: 39px;
                text-align: center;
                line-height: 40px;
                font-size: 18px;
            }
            /*第二页*/
            .tab_con_href_all{
                display: block;
                text-align: center;
                overflow: hidden;
            }
            .tab_con_href_all img{
                height: 350px;
            }
            .tab_con_txt_all{
                position: absolute;
                bottom: 0;
                height: 39px;
                width: 100%;
                /*绝对定位之后,可以用width:100%,来扩宽,然后text-align:center; 水平居中*/
                text-align: center;
                line-height: 40px;
                font-size: 18px;
                background: rgba(0,0,0,0.6);
            }
            .tab_con_txt_all a{
                color: #fff;
            }
            /*第三页、第四页、第五页*/
            .tab_con_href_mask_li{
                text-align: center;
                height: 350px;
                position: relative;
            }
            .tab_con_href_mask_img{
                height: 310px;
                line-height: 310px;
                overflow: hidden;
            }
            .tab_con_href_mask_img img{
                max-width: 100%;
                vertical-align: middle;
            }
            .tab_con_mask_txt{
                border-top: 1px solid #ccc;
                height: 39px;
                text-align: center;
                line-height: 40px;
                font-size: 18px;
            }
            .tab_con_href_mask{
                position: absolute;
                display: block;
                width: 100%;
                height: 350px;
                top: 0;
                left: 0;
                z-index: 998;
            }
            /*第四页*/
            .tab_con_href_mask_img_4{
                height: 350px;
                overflow: hidden;
            }
            .tab_con_href_mask_img_4 img{
                height: 350px;
            }
            .tab_con_mask_txt_4{
                position: absolute;
                bottom: 0;
                width: 100%;
                background: rgba(0,0,0,0.6);
                text-align: center;
                border-top: 1px solid #ccc;
                height: 39px;
                line-height: 40px;
                font-size: 18px;
            }
            .tab_con_mask_txt_4 a{
                color: #fff;
            }
        </style>
    </head>
    <body>
        <div class="tab_wrapper_test1">
            <div class="tab_menu">
                <a href="javascript:;" class="menu_active">热点
                </a><i class="border_right"></i><a href="javascript:;">社会
                </a><i class="border_right"></i><a href="javascript:;">娱乐
                </a><i class="border_right"></i><a href="javascript:;">军事
                </a><i class="border_right"></i><a href="javascript:;">体育
                </a><i class="border_right"></i><a href="javascript:;">财经
                </a><i class="border_right"></i><a href="javascript:;">汽车
                </a><i class="border_right"></i><a href="javascript:;">游戏</a>
                <!--这里的i是那个a之间的竖线,可以用a的border-right做,也可以直接写个| -->
                <!--inline-block之间有间隙,解决方法有:压缩代码、浮动、标签前后折叠-->
            </div>
            <div class="tab_content">
                <ul>
                    <li class="tab_con_item con_active">
                        <!--这里我用了3种方式写最外层的a链接-->
                        <a href="javascript:;" class="tab_con_href_half">
                            <!--a链接只包住图片-->
                            <img src="images/1.jpg" title="girl" alt="girl"/>
                        </a>
                        <div class="tab_con_txt_half">
                            <a href="javascript:;">美丽女孩人人爱</a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <a href="javascript:;" class="tab_con_href_all">
                            <!--a链接只包住所有-->
                            <img src="images/cat.jpeg" title="cat" alt="cat"/>
                            <div class="tab_con_txt_all">
                                <a href="javascript:;">可爱猫咪</a>
                            </div>
                        </a>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img">
                                <img src="images/xiaoxin.gif" title="蜡笔小新" alt="蜡笔小新"/>
                            </div>
                            <div class="tab_con_mask_txt">
                                <a href="javascript:;">动感超人biu biu</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/2.jpg" title="帅哥" alt="帅哥"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">帅男</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>                    
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat2.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat.jpeg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                </ul>
            </div>
            <!--这里的箭头可以用图片,也可以用纯css代码,也可以用转义字符+SimSun字体-->
            <a href="javscript:;" class="prev">&lt;</a>
            <a href="javscript:;" class="next">&gt;</a>
        </div>
        
        <div class="tab_wrapper_test2">
            <div class="tab_menu">
                <a href="javascript:;" class="menu_active">热点
                </a><i class="border_right"></i><a href="javascript:;">社会
                </a><i class="border_right"></i><a href="javascript:;">娱乐
                </a><i class="border_right"></i><a href="javascript:;">军事
                </a><i class="border_right"></i><a href="javascript:;">体育
                </a><i class="border_right"></i><a href="javascript:;">财经
                </a><i class="border_right"></i><a href="javascript:;">汽车
                </a><i class="border_right"></i><a href="javascript:;">游戏</a>
                <!--这里的i是那个a之间的竖线,可以用a的border-right做,也可以直接写个| -->
                <!--inline-block之间有间隙,解决方法有:压缩代码、浮动、标签前后折叠-->
            </div>
            <div class="tab_content">
                <ul>
                    <li class="tab_con_item con_active">
                        <!--这里我用了3种方式写最外层的a链接-->
                        <a href="javascript:;" class="tab_con_href_half">
                            <!--a链接只包住图片-->
                            <img src="images/1.jpg" title="girl" alt="girl"/>
                        </a>
                        <div class="tab_con_txt_half">
                            <a href="javascript:;">美丽女孩人人爱</a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <a href="javascript:;" class="tab_con_href_all">
                            <!--a链接只包住所有-->
                            <img src="images/cat.jpeg" title="cat" alt="cat"/>
                            <div class="tab_con_txt_all">
                                <a href="javascript:;">可爱猫咪</a>
                            </div>
                        </a>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img">
                                <img src="images/xiaoxin.gif" title="蜡笔小新" alt="蜡笔小新"/>
                            </div>
                            <div class="tab_con_mask_txt">
                                <a href="javascript:;">动感超人biu biu</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/2.jpg" title="帅哥" alt="帅哥"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">帅男</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>                    
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat2.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat3.jpg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                    <li class="tab_con_item  ">
                        <div class="tab_con_href_mask_li">
                            <div class="tab_con_href_mask_img_4">
                                <img src="images/cat.jpeg" title="猫咪" alt="猫咪"/>
                            </div>
                            <div class="tab_con_mask_txt_4">
                                <a href="javascript:;">猫咪</a>
                            </div>
                            <a href="javascript:;" class="tab_con_href_mask">
                                <!--a链接做遮罩层-->
                            </a>
                        </div>
                    </li>
                </ul>
            </div>
            <!--这里的箭头可以用图片,也可以用纯css代码,也可以用转义字符+SimSun字体-->
            <a href="javscript:;" class="prev">&lt;</a>
            <a href="javscript:;" class="next">&gt;</a>
        </div>
        
        <script type="text/javascript">
            window.onload = function(){
                function TabControl(obj){
                    //选项卡菜单控制部分
                    this.oMenu = obj.getElementsByClassName(tab_menu)[0];
                    this.menuItem = this.oMenu.getElementsByTagName(a);
                    //前后控制按钮
                    this.prev = obj.getElementsByClassName(prev)[0];
                    this.next = obj.getElementsByClassName(next)[0];
                    //选项卡内容部分
                    this.con = obj.getElementsByClassName(tab_content)[0];
                    this.conItem = this.con.getElementsByClassName(tab_con_item);
                    
                    //变量设置
                    //选项卡页数
                    this.count = this.conItem.length;
                    //当前第几页,默认为第一页,也就是0
                    this.current = 0;
                    var that = this;
                    
                    //菜单控制事件
                    for(var i = 0; i < this.count; i++){
                        //设置当前索引,这种设置方法需掌握
                        this.menuItem[i].index = i;
                        this.menuItem[i].onclick = function(){
                            that.current = this.index;
                            that.menuSwitch();
                        }
                    }
                    
                    //原型方法
                    //构造函数执行到这里的时候,会判断实例是否有menuSwitch方法,
                    //第一次执行构造函数时,实例是没有menuSwitch方法的,就执行if方法块的代码;
                    //之后再执行此构造函数时,原型上已经有这个方法了,就不会进入
                    //原型上的方法有很多,但是只用检测一个就行了,没必要都检测
                    if(typeof this.menuSwitch != function){
                        //原型还可以用字面对象的形式,但要记得手动改变constructor指向,
                        TabControl.prototype = {
                            //字面对象的方式会改变constructor指向,我们手动改变回来
                            constructor : TabControl,
                            //菜单控制
                            menuSwitch : function(){
                                //清空所有class名
                                for(var j = 0;j < this.count; j++){
                                    this.menuItem[j].className = ‘‘;
                                    this.conItem[j].className = tab_con_item;
                                }
                                //给当前页添加class名
                                this.menuItem[this.current].className = menu_active;
                                this.conItem[this.current].className = tab_con_item con_active;
                            },
                            //前按钮控制
                            btnPrevSwitch : function(){
                                if(this.current > 0){
                                    //清空前页class名
                                    this.menuItem[this.current].className = ‘‘;
                                    this.conItem[this.current].className = tab_con_item;
                                    //页数自减1
                                    this.current--;
                                    //当前页添加class名
                                    this.menuItem[this.current].className = menu_active;
                                    this.conItem[this.current].className = tab_con_item con_active;
                                }else if(this.current == 0){
                                    //清空前页class名
                                    this.menuItem[this.current].className = ‘‘;
                                    this.conItem[this.current].className = tab_con_item;
                                    //页数跳转至最后一页
                                    this.current = this.count-1;
                                    //当前页添加class名
                                    this.menuItem[this.current].className = menu_active;
                                    this.conItem[this.current].className = tab_con_item con_active;
                                }
                            },
                            //后按钮控制
                            btnNextSwitch : function(){
                                if(this.current < this.count-1){
                                    //清空前页class名
                                    this.menuItem[this.current].className = ‘‘;
                                    this.conItem[this.current].className = tab_con_item;
                                    //页数自增1
                                    this.current++;
                                    //当前页添加class名
                                    this.menuItem[this.current].className = menu_active;
                                    this.conItem[this.current].className = tab_con_item con_active;
                                }else if(this.current == this.count-1){
                                    //清空前页class名
                                    this.menuItem[this.current].className = ‘‘;
                                    this.conItem[this.current].className = tab_con_item;
                                    //页数跳转至第一页
                                    this.current = 0;
                                    //当前页添加class名
                                    this.menuItem[this.current].className = menu_active;
                                    this.conItem[this.current].className = tab_con_item con_active;
                                }
                            }
                        }
                        //初次调用时,重新调用构造函数返回
                        return new TabControl(obj);
                        //return 构造函数时,实例就不是指向 var tab1 = new TabControl时系统创建的那个object1,
                        //而是指向了return new TabControl时创建的object2,这两个对象的隐式原型是不一样的,
                        //因为在创建object2之前已经修改了TabControl.prototype,
              //所以object2的隐式原型已经指向了修改后的TabControl.prototype,因此可以找到原型上的方法
} //前按钮控制 this.prev.onclick = function(){ that.btnPrevSwitch(); } //后按钮控制 this.next.onclick = function(){ that.btnNextSwitch(); } //自循环 var autoTimer = null; //直接执行 autoTimer = setInterval(function(){ that.btnNextSwitch(); },2000); //进入选项卡,清空计时器 obj.onmouseover = function(){ clearInterval(autoTimer); } //离开选项卡,计时器开始工作 obj.onmouseout = function(){ autoTimer = setInterval(function(){ that.btnNextSwitch(); },2000); } } var oTab1 = document.getElementsByClassName(tab_wrapper_test1)[0]; var tab1 = new TabControl(oTab1); var oTab2 = document.getElementsByClassName(tab_wrapper_test2)[0]; var tab2 = new TabControl(oTab2); } </script> </body> </html>

 

jacascript 原生选项卡插件