a标签做锚点 图片切换

Posted 常想一二

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一.a标签设置锚点 

1、使用id定位: 

<a href="#fifth">锚点跳到5F</a>
<p style="height: 1300px">
    中间有很多内容
</p>
<div id="fifth" style="height: 1300px"> 这里是5F的内容
</div>

 

这样的定位可以针对任何设置Id属性的标签来定位。

 2、使用a标签的属性name定位: 

<a href="#fifth">锚点跳到5F</a>
<p style="height: 1300px">
    中间有很多内容
</p>
<a name="fifth" > 这里是5F的内容
</a>
<div style="height: 1300px"> 这里是6F的内容 </div>

 

使用name属性只能针对a标签来定位,而对其他标签就不能起到定位作用。 

3注意:锚点也可以跳转到其他网页,在“#”前面写网页

<div> <a href="photo/maodian.html#fifth">锚点跳到5F</a> </div>

 跳到相对路径about/index.html页面的fifth 

 常常用于返回头部,返回主页,


二应用: 图片切换 

 (1)先布局,每张图片都有左右两个锚点(a标签跳转)。点击左右小图片(锚点)可以跳转到对应图片位置

 


 

(2)给父容器.wrap设合适的宽高,设置 overflow: hidden,使之实现——点击图片切换

(3)源代码

 <ul class="wrap">
     <li id="pic1"><img class="Picture" src="images/pic1.jpg" alt="图片1"/>
         <a href="#pic9" class="left">
             <img src="images/pic9.jpg"/>
         </a>
         <a  href="#pic2" class="right">
             <img class="right" src="images/pic2.jpg">
         </a>
     </li>
     <li id="pic2"><img  class="Picture" src="images/pic2.jpg" alt="图片2"/>
         <a href="#pic1" class="left">
             <img src="images/pic1.jpg"/>
         </a>
         <a  href="#pic3" class="right">
             <img class="right" src="images/pic3.jpg">
         </a>
     </li>
     <li id="pic3"><img class="Picture" src="images/pic3.jpg" alt="图片3"/>
         <a  href="#pic2" class="left">
             <img class="right" src="images/pic2.jpg">
         </a>
         <a  href="#pic4" class="right">
             <img class="right" src="images/pic4.jpg">
         </a>
     </li>
     <li id="pic4"><img class="Picture" src="images/pic4.jpg" alt="图片4"/>
         <a  href="#pic3" class="left">
             <img class="right" src="images/pic3.jpg">
         </a>
         <a  href="#pic5" class="right">
             <img class="right" src="images/pic5.jpg">
         </a>
     </li>
     <li id="pic5"><img class="Picture" src="images/pic5.jpg" alt="图片5"/>
         <a  href="#pic4" class="left">
             <img class="right" src="images/pic4.jpg">
         </a>
         <a  href="#pic6" class="right">
             <img class="right" src="images/pic6.jpg">
         </a>
     </li>
     <li id="pic6"><img class="Picture" src="images/pic6.jpg" alt="图片6"/>
         <a  href="#pic5" class="left">
             <img class="right" src="images/pic5.jpg">
         </a>
         <a  href="#pic7" class="right">
             <img class="right" src="images/pic7.jpg">
         </a>
     </li>
     <li id="pic7"><img class="Picture" src="images/pic7.jpg" alt="图片7"/>
         <a  href="#pic6" class="left">
             <img class="right" src="images/pic6.jpg">
         </a>
         <a  href="#pic8" class="right">
             <img class="right" src="images/pic8.jpg">
         </a>
     </li>
     <li  id="pic8"><img class="Picture" src="images/pic8.jpg" alt="图片8"/>
         <a  href="#pic7" class="left">
             <img class="right" src="images/pic7.jpg">
         </a>
         <a  href="#pic9" class="right">
             <img class="right" src="images/pic9.jpg">
         </a>
     </li>
     <li  id="pic9"><img class="Picture" src="images/pic9.jpg" alt="图片9"/>
         <a href="#pic8" class="left">
             <img src="images/pic8.jpg"/>
         </a>
         <a  href="#pic1" class="right">
             <img class="right" src="images/pic1.jpg">
         </a>
     </li>
 </ul>

  

      /*  end  reset  css     */
        .wrap{
            width: 900px;
            height: 700px;
            margin:0 auto;
            overflow: hidden;
        }
        .wrap li{
            width:100%;
            height:100%;
            background-color: #cecece;
        }
      /*  给中心图片左右小锚点设置定位。当然也可以是其他方式,如浮动*/
        .wrap li{ position: relative;}
        .wrap li .Picture,  .wrap li a{
            position: absolute;
        }
        .wrap li .Picture{
            top: 50%;  left: 50%;
            margin-left: -300px;
            margin-top: -230px;
            width:600px;  height: 460px;
        }
        .wrap li a{
            top: 40%;
            width:150px;
            height: 200px;
        }
        .wrap  a.left{
            left: 0;
        }
        .wrap  a.right{
            right: 0;
        }
        .wrap  a img{
            width: 100%;
            height: 100%;}

  

 三、应用-图片切换2

(1)先布局:左右两栏。点击右侧锚点跳转到对应图片位置

 

(2)给左侧的父容器设合适的宽高,设置 overflow: hidden,使之实现点击图片切换

(3)源代码

<div class="wrap">
    <ul class="main">
        <li id="pic1"><img  class="Picture" src="images/pic1.jpg" alt="图片2"/></li>
        <li id="pic2"><img  class="Picture" src="images/pic2.jpg" alt="图片2"/></li>
        <li id="pic3"><img  class="Picture" src="images/pic3.jpg" alt="图片2"/></li>
        <li id="pic4"><img  class="Picture" src="images/pic4.jpg" alt="图片2"/></li>
        <li id="pic5"><img  class="Picture" src="images/pic5.jpg" alt="图片2"/></li>
        <li id="pic6"><img  class="Picture" src="images/pic6.jpg" alt="图片2"/></li>
        <li id="pic7"><img  class="Picture" src="images/pic7.jpg" alt="图片2"/></li>
        <li id="pic8"><img  class="Picture" src="images/pic8.jpg" alt="图片2"/></li>
        <li id="pic9"><img  class="Picture" src="images/pic9.jpg" alt="图片2"/></li>

    </ul>
    <div class="aside">
        <a href="#pic1"><img  class="Picture" src="images/pic1.jpg" alt="图片2"/></a>
        <a href="#pic2"><img  class="Picture" src="images/pic2.jpg" alt="图片2"/></a>
        <a href="#pic3"><img  class="Picture" src="images/pic3.jpg" alt="图片2"/></a>
        <a href="#pic4"><img  class="Picture" src="images/pic4.jpg" alt="图片2"/></a>
        <a href="#pic5"><img  class="Picture" src="images/pic5.jpg" alt="图片2"/></a>
        <a href="#pic6"><img  class="Picture" src="images/pic6.jpg" alt="图片2"/></a>
        <a href="#pic7"><img  class="Picture" src="images/pic7.jpg" alt="图片2"/></a>
        <a href="#pic8"><img  class="Picture" src="images/pic8.jpg" alt="图片2"/></a>
    </div>
</div>

  

    /*  end  reset  css     */
        /* start common css*/
        .wrap{
            width: 900px;
            height: 660px;
            margin:0 auto;
        }
        .main{
            float: left;
            width: 600px;
            height: 560px;

        }
        .main li img{
            margin:100px auto;
            width: 480px;
            height: 360px;}
        .aside{
            float: right;
            width: 300px;
            height: 660px;
        }
        .aside a{

            }
        .aside a img{
            margin-bottom: 20px;
            width: 100px;
            height: 100px; }

  

 

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