js手风琴

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        #box {
            width: 590px;
            height: 340px;
            border: #000 1px solid;
            position: relative;
            margin: 50px auto;
            overflow: hidden;
        }

        #box li {
            position: absolute;
            width: 590px;
            height: 340px;
        }
    </style>
    <script src="move.js"></script>
    <script>
        window.onload = function () {
            var oBox = document.getElementById('box');
            var aLi = oBox.children;

            var w = 40;

            for (var i = 1; i < aLi.length; i++) {
                aLi[i].style.left = oBox.offsetWidth - w * (aLi.length - i) + 'px';
            }

            for (var i = 0; i < aLi.length; i++) {
                aLi[i].index = i;
                aLi[i].onmouseover = function () {
                    for (var i = 0; i < aLi.length; i++) {
                        if (i <= this.index) {
                            move(aLi[i], {left: w * i});
                        } else {
                            move(aLi[i], {left: oBox.offsetWidth - w * (aLi.length - i)});
                        }
                    }
                }
            }
        }
    </script>
</head>
<body>
<ul id="box">
    <li style="background: pink"></li>
    <li style="background: green"></li>
    <li style="background: yellow"></li>
    <li style="background: red"></li>
    <li style="background: blue"></li>
</ul>
</body>
</html>