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[网页设计]使用js制作一般网站首页图片轮播效果


<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>图片轮播</title>  <style>    .warp{      width: 600px;      height: 750px;      position: relative;      margin:30px auto 0;      overflow: hidden;    }    #box{      width: 600px;      height: 750px;      position: absolute;      top: 0px;      left: 0px;      overflow: hidden;      /*overflow-x:auto;*/    }    #box #con{      width: 6000px;      height: 750px;      overflow: hidden;    }    #con img{      float: left;      width: 600px;      height: 750px;    }    #btnL{      position: absolute;      left: 0px;      top: 366px;      width: 36px;      height: 36px;      background: url(images/btnL.png) 0 0 no-repeat;      cursor: pointer;    }    #btnR{      position: absolute;      right: 0px;      top: 366px;      width: 36px;      height: 36px;      background: url(images/btnR.png) 0 0 no-repeat;      cursor: pointer;    }    #num{      position: absolute;      bottom: 10px;      left: 148px;      overflow: hidden;      list-style: none;    }    #num li{      float: left;      margin:0 5px;      font-size: 16px;      line-height: 25px;      height: 25px;      width: 25px;      background: #ccc;      text-align: center;      cursor: pointer;    }    #num li.select{      background-color: green;      color: white;    }  </style></head><body>  <div class="warp">    <div id="box">      <div id="con">        <img src="images/meinv1.jpg" alt="">        <img src="images/meinv2.jpg" alt="">        <img src="images/meinv3.jpg" alt="">        <img src="images/meinv4.jpg" alt="">        <img src="images/meinv5.jpg" alt="">        <img src="images/meinv6.jpg" alt="">      </div>    </div>    <div id="btnL"></div>    <div id="btnR"></div>    <ul id="num">      <li class="select">1</li>      <li>2</li>      <li>3</li>      <li>4</li>      <li>5</li>      <li>6</li>    </ul>  </div>  <script>    var box=document.getElementById('box');    var con=document.getElementById('con');    var imgs=con.getElementsByTagName('img');    var btnL=document.getElementById('btnL');    var btnR=document.getElementById('btnR');    var num=document.getElementById('num');    var lis=num.getElementsByTagName('li');    var timer1=null,timer2=null;    var imgw=imgs[0].clientWidth;    var x=0;    function imgScroll(){//图片切换     var start=box.scrollLeft;      var end=imgw*x;      var change=end-start;      var minstep=0;      var maxstep=30;      var stepLength=change/maxstep;        clearInterval(timer2);        timer2=setInterval(function(){          minstep++;          // console.log(minstep);          if (minstep>=maxstep) {            clearInterval(timer2);          }          start+=stepLength;          box.scrollLeft=start;        },20)          for (var i = 0; i < lis.length; i++) {          lis[i].className='none';        }        lis[x].className='select';    }    function move(){//默认向左每隔3s滚动      clearInterval(timer1);      timer1=setInterval(function(){        x++;        if (x>=imgs.length) {          x=0;        }       imgScroll();       for (var i = 0; i < lis.length; i++) {         lis[i].className='none';         lis[x].className='select';       }        },3000);      }    move();//启动默认滚动函数;    btnR.onclick=function(){      clearInterval(timer1);      x++;      if (x>=imgs.length) {        x=0;      }     imgScroll();     move();    }    btnL.onclick=function(){      clearInterval(timer1);      x--;      if (x<0) {        x=imgs.length-1;      }     imgScroll();      move();    }    for (var i = 0; i < lis.length; i++) {      lis[i].index=i;      lis[i].onclick=function(){        x=this.index;        imgScroll();        move();      }    }  </script></body></html>

具体效果我是仿照hao123导航页面图片轮播的效果,大家可以去那个网站参考