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@@ -0,0 +1,73 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ body{
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+ margin: 0;
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+ }
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+ .small-img{
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+ width: 400px;
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+ height: 400px;
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+ background-image: url("./img/niu.png");
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+ background-size: 400px 400px;
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+ position: relative;
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+ float: left;
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+ }
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+ .bg{
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+ width: 200px;
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+ height: 200px;
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+ background-color: rgba(255,255,255,0.6);
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+ position: absolute;
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+ }
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+ .big-img{
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+ width: 400px;
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+ height: 400px;
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+ background-image: url("./img/niu.png");
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+ float: left;
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+ margin-left: 30px;
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+ background-size: 800px 800px;
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+
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+ }
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+ </style>
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+</head>
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+<body>
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+ <div class="small-img">
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+ <div class="bg"></div>
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+ </div>
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+ <div class="big-img">
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+
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+ </div>
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+ <script>
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+ var oBg = document.getElementsByClassName("bg")[0];
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+ var oSmallImg = document.getElementsByClassName("small-img")[0];
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+ var oBigImg = document.getElementsByClassName("big-img")[0];
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+
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+
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+ oSmallImg.onmousemove = function(event){
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+ var x = event.clientX - 100;
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+ var y = event.clientY - 100;
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+
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+ if(y<=0){
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+ y = 0;
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+ }
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+ if(x<=0){
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+ x = 0;
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+ }
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+ if(y>=200){
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+ y = 200;
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+ }
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+ if(x >= 200){
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+ x = 200;
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+ }
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+
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+ oBg.style.top = y + "px";
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+ oBg.style.left = x + "px";
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+ oBigImg.style.backgroundPosition = (-2*x)+"px " + (-2*y) +"px";
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+ }
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+
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+ </script>
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+</body>
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+</html>
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