基于javascript实现图片滑动效果

今天看了别人写的图片滑动，看起来很酷，读源码时，似乎有些困难，就模仿着写了一个，实现的效果与原网页相同，不过自己的js代码，逻辑简单，有待改进。
ps：前两天写了旋转木马，那个兼容性不好，今天写这个网页的时候，也是按照这个思路，在谷歌浏览器上运行很好，火狐很多功能不能实现，由于wrap——panel使用了绝对定位，就将translate平移改为了left。改动后，各个浏览器运行的效果不错。

具体代码如下

html代码（没写注释）

<div class="container">
    <h1>Parallax Slider</h1>
    <div class="wrap">
      <div class="bg-img">
        <div id="bg_1" class="bg bg-1" style="left: 0px;"></div>
        <div id="bg_2" class="bg bg-2" style="left: 0px;"></div>
        <div id="bg_3" class="bg bg-3" style="left: 0px;"></div>
      </div>
      <div id="wrap_panel" class="wrap-panel" style="left: 0px;">
        <div class="panel panel-1">
          <img id="img_1" src="images/1.jpg">
        </div>
        <div class="panel panel-2">
          <img src="images/2.jpg">
        </div>
        <div class="panel panel-3">
          <img src="images/3.jpg">
        </div>
        <div class="panel panel-4">
          <img src="images/4.jpg">
        </div>
        <div class="panel panel-5">
          <img src="images/5.jpg">
        </div>
        <div class="panel panel-6">
          <img src="images/6.jpg">
        </div>
      </div>
      <div class="navigation-button">
        <span id="perv_btn" class="perv-button"></span>
        <span id="next_btn" class="next-button"></span>
      </div>
      <div id="show_small" class="show-small">
        <ul>
          <li><img src="images/thumbs/1.jpg"></li>
          <li><img src="images/thumbs/2.jpg"></li>
          <li><img src="images/thumbs/3.jpg"></li>
          <li><img src="images/thumbs/4.jpg"></li>
          <li><img src="images/thumbs/5.jpg"></li>
          <li><img src="images/thumbs/6.jpg"></li>
        </ul>
      </div>
    </div>
  </div> 

css代码（自己对应着看）：

* { margin: 0; padding: 0; }
  html, body, .container { width: 100%; height: 100%; font-family: 'Microsoft Yahei'; }
  .container { background-color: #222; overflow-x: hidden; }
  .container h1 { font-size: 50px; color: #ccc; text-align: center; font-weight: bolder; height: 120px; line-height: 120px; }
  .wrap { position: relative; width: 600%; height: 400px; border-top: 10px solid #333; border-bottom: 10px solid #333; margin-top: 20px; }
  .bg { position: absolute; width: 100%; height: 100%; left: 0; top: 0; -webkit-transition: all 1s;-moz-transition: all 1s;-ms-transition: all 1s;-o-transition: all 1s;transition: all 1s; }
  .bg-1 { background: url(images/bg1.png); }
  .bg-2 { background: url(images/bg2.png); }
  .bg-3 { background: url(images/bg3.png); }
  .wrap-panel { position: absolute; width: 100%; height: 100%; -webkit-transition: all 1s; -moz-transition: all 1s; -ms-transition: all 1s; -o-transition: all 1s; transition: all 1s; }
  .panel { width: 16.66%; height: 100%; float: left; }
  .panel img { display: block; margin: 0 auto; margin-top: 35px; border-radius: 10px; border: 10px solid rgba(143, 143, 143, 0.6); }
  .navigation-button span:hover { opacity: 0.8 }
  .perv-button, .next-button { position: absolute; width: 30px; height: 60px; background-color: #344133; border-radius: 10px; cursor: pointer; opacity: 0.4; }
  .perv-button { background: #000 url(images/prev.png) center center no-repeat; }
  .next-button { background: #000 url(images/next.png) center center no-repeat; }
  .show-small { position: absolute; width: 680px; bottom: 20px; }
  .show-small ul { list-style: none; }
  .show-small ul li { float: left; margin: 0 10px; border: 5px solid #fff; opacity: 0.7; cursor: pointer;-webkit-transition: all .3s; -moz-transition: all .3s; -ms-transition: all .3s;-o-transition: all .3s; transition: all .3s; }
  .show-small ul li:hover { margin-top: -15px; }

js代码（小demo）：

window.onload = function() {
      // 得到元素
      var getDOM = function (id){
        return typeof id==="string"?document.getElementById(id):id;
      } 

      // 得到对象
      var img = getDOM('img_1');
      var prev = getDOM("perv_btn");
      var next = getDOM("next_btn");
      var wrap_panel = getDOM('wrap_panel');
      var bg_1 = getDOM("bg_1");
      var bg_2 = getDOM("bg_2");
      var bg_3 = getDOM("bg_3");
      var show_small = getDOM("show_small");
      var list = show_small.getElementsByTagName("li");
      var wwidth; 

       // 为元素绑定事件
      var addEvent = function(id,event,fn) {
       var el = getDOM(id) || document;
       if(el.addEventListener){
        el.addEventListener(event,fn,false);
       }else if(el.attachEvent){
        el.attachEvent('on' + event,fn);
       }
      }
      function init() { 

        // 对按钮进行定位
        // 向前按钮的左边距离=图片的左距离+边框
        prev.style.left = img.offsetLeft + 10 + 'px';
        // 向前按钮的上边距离=图片的上距离+图片高度的一半-按钮高度的一半
        prev.style.top = img.offsetTop + img.clientHeight/2 - prev.clientHeight/2 + 'px';
        next.style.left = img.offsetLeft + img.clientWidth + 10 - next.clientWidth + 'px';
        next.style.top =prev.style.top; 

        // 对小图片的容器进行定位
        wwidth = document.documentElement.clientWidth || document.body.clientWidth;
        show_small.style.left = (wwidth - show_small.clientWidth)/2 + 'px';
      } 

      // 小图片的处理
      function small_img() {
        // 对图片进行旋转处理
        for (var i = 0;i< list.length; i++) {
          // 旋转方向
          var direction = Math.pow(-1,parseInt(Math.random()*10));
          list[i].style = "transform:rotate(" + (Math.random()*20*direction) + "deg)";
        }
        list[0].style.opacity = 1;
      } 

      function only_one(el,num) {
        for (var i = 0; i < el.length; i++) {
          el[i].style.opacity = 0.7;
        }
        // console.log(num);
        el[num].style.opacity = 1;
      } 

      // 浏览器缩放时
      window.onresize = function() {
        init();
      } 

      // 执行函数
      init();
      small_img();
      addEvent(prev,'click',function() {
        // 改变wrap-panel的left
        var oldPos = parseInt(wrap_panel.style.left); 

        if(oldPos == 0) {   

          // 背景平移 图片容器平移
          bg_1.style.left=bg_2.style.left=bg_3.style.left=wrap_panel.style.left = -wwidth*(list.length-1) +'px'; 

          // 更改对应小图片透明度
          only_one(list,list.length-1);
        } else { 

          // 背景平移 图片容器平移
          wrap_panel.style.left = (oldPos + wwidth) +'px';
          bg_1.style.left= (oldPos + wwidth - parseInt(-(oldPos/wwidth + 1))*100) +'px';
          bg_2.style.left= (oldPos + wwidth - parseInt(-(oldPos/wwidth + 1))*300) +'px';
          bg_3.style.left= (oldPos + wwidth - parseInt(-(oldPos/wwidth + 1))*500) +'px'; 

          // 更改对应小图片透明度
          only_one(list,parseInt(-(oldPos/wwidth + 1)));
        }
      });
      addEvent(next,'click',function() {
        // 改变wrap-panel的left
        var oldPos = parseInt(wrap_panel.style.left);         

        if(oldPos == -wwidth*(list.length-1)) {    

          // 背景平移 图片容器平移
          bg_1.style.left=bg_2.style.left=bg_3.style.left=wrap_panel.style.left = '0px'; 

          // 更改对应小图片透明度
          only_one(list,0);
        } else {
          // 背景平移 图片容器平移
          wrap_panel.style.left = (oldPos - wwidth) +'px';
          bg_1.style.left= (oldPos - wwidth + parseInt(-(oldPos/wwidth + 1))*100) +'px';
          bg_2.style.left= (oldPos - wwidth + parseInt(-(oldPos/wwidth + 1))*300) +'px';
          bg_3.style.left= (oldPos - wwidth + parseInt(-(oldPos/wwidth + 1))*500) +'px'; 

          // 更改对应小图片透明度
          only_one(list,parseInt(-(oldPos/wwidth - 1)));
        }
      });
    }

以上就是本文的全部内容，希望对大家学习javascript程序设计有所帮助。