JS实现的点击按钮图片上下滚动效果示例

时间:2020-05-16 s_psycho 人气:0

本文实例讲述了JS实现的点击按钮图片上下滚动效果。分享给大家供大家参考，具体如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    *{
      margin: 0;
      padding:0;
      list-style: none;
    }
    .big{
      width: 200px;
      height: 200px;
      margin:100px auto;
    }
    ul{
      width: 100px;
      height: 100px;
      border: 1px solid black;
      position: relative;
      overflow: hidden;
    }
    li{
      width: 100px;
      height: 100px;
      line-height: 100px ;
      text-align: center;
    }
    .color1{
      background: red;
      position: absolute;
    }
    .color2{
      background: yellow;
      position: absolute;
    }
    .color3{
      background: pink;
      position: absolute;
    }
    .color4{
      background: green;
      position: absolute;
    }
    .input1{
      width: 30px;
      height: 30px;
      margin: 10px ;
      position: absolute;
      top:150px ;
      left:550px;
    }
    .input2{
      width: 30px;
      height: 30px;
      margin: 10px ;
      position: absolute;
      top:150px ;
      left:590px;
    }
  </style>
</head>
<body>
<div class="big">
<ul>
  <li class="color1" style="top:0;">1</li>
  <li class="color2" style="top:100px;">2</li>
  <li class="color3" style="top:200px;">3</li>
  <li class="color4" style=" top:-100px;">4</li>
</ul>
  <input class="input1" type="button" value="1">
  <input class="input2" type="button" value="2">
</div>
<script>
  window.onload=function () {
    var oIpt1=document.getElementsByTagName("input")[0];
    var oIpt2=document.getElementsByTagName("input")[1];
    var allColor=document.getElementsByTagName("li");
    oIpt2.addEventListener("click",function () {
      for(var i=0;i<allColor.length;i++){
        allColor[i].style.top=parseFloat(allColor[i].style.top)-100+"px";
        allColor[i].style.transition=1+"s"
            if(allColor[i].style.top==-300+"px"){
              allColor[i].style.top=100+"px"
              allColor[i].style.transition=0+"s"
            }
      }
    },false)
    oIpt1.addEventListener("click",function () {
      for(var i=0;i<allColor.length;i++){
        allColor[i].style.top=parseFloat(allColor[i].style.top)+100+"px";
        allColor[i].style.transition=1+"s"
        if (allColor[i].style.top==400+"px"){
          allColor[i].style.top=0+"px"
          allColor[i].style.transition=0+"s"
        }
      }
    },false)
  }
</script>
</body>
</html>

这里使用在线HTML/CSS/JavaScript代码运行工具：http://tools.softyun.net/code/HtmlJsRun测试上述代码，可得如下运行结果：

希望本文所述对大家JavaScript程序设计有所帮助。

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