利用JS做网页特效_大图轮播 | 实例讲解

利用JS做网页特效_大图轮播 | 实例讲解

废话不多说,直接上代码:

<style>      * {        margin: 0px;        padding: 0px;      }            .stage {        width: 500px;        height: 300px;        border: 5px solid black;        margin: 200px;        position: relative;        overflow: hidden;      }            .to-left,      .to-right {        position: absolute;        top: 0px;        width: 50px;        height: 300px;        background-color: black;        color: white;        font-size: 30px;        text-align: center;        line-height: 300px;        opacity: 0.3;      }            .to-left {        left: 0px;      }            .to-right {        right: 0px;      }            .to-left:hover,      .to-right:hover {        cursor: pointer;        opacity: 0.5;      }            .banner {        width: 3000px;        height: 300px;      }            .items {        float: left;        width: 500px;        height: 300px;        background-color: blanchedalmond;        font-size: 100px;        text-align: center;        line-height: 300px;      }    </style>  </head><!--大图轮播特效-->  <body>    <div class="stage">      <div class="to-left">        <</div>          <div class="to-right">></div>          <div class="banner">            <div class="items">1</div>            <div class="items" style="">2</div>            <div class="items" style="">3</div>            <div class="items" style="">4</div>            <div class="items" style="">5</div>            <div class="items">1</div>          </div>      </div>  </body></html><script>  var to_right = document.getElementsByClassName('to-right')[0];  var to_left = document.getElementsByClassName('to-left')[0];  var banner = document.getElementsByClassName('banner')[0];  var arr = [];  var count = 1;  to_right.onclick = function() {    toRight();  }    function toRight(){    arr.push(window.setInterval("moveLeft()", 30));  }    to_left.onclick = function() {    toLeft();  }  function toLeft(){    arr.push(window.setInterval("moveRight()", 30));  }    function moveLeft() {    if(count < 5) {      if(banner.offsetLeft > count * (-500)) {        banner.style.marginLeft = banner.offsetLeft - 20 + "px";      } else {        for(var x in arr) {          window.clearInterval(arr[x]);        }        count++;      }//  连接点    }else{      if(banner.offsetLeft > count * (-500)) {        banner.style.marginLeft = banner.offsetLeft - 20 + "px";      } else {        for(var x in arr) {          window.clearInterval(arr[x]);        }        count = 1;        banner.style.marginLeft = 0 + 'px';      }    }  }    function moveRight() {    if(count-1 >0) {      if(banner.offsetLeft < (count-2) * (-500)) {        banner.style.marginLeft = banner.offsetLeft + 20 + "px";      } else {        for(var x in arr) {          window.clearInterval(arr[x]);        }        count--;      }    }  }  window.setInterval("toRight()",1750);  </script>

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tag:网页特效大图实例电脑软件js

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