运行效果如下：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JS按钮控制内容左右滚动</title>
<style>
*{ padding: 0; margin: 0;}
li{ list-style: none;}
.clearfix{ *zoom:1;}
.clearfix:after{ clear: both; display: block; content: ""; height: 0; overflow: hidden;}
a{ text-decoration: none; color: #333;}
a:hover{ color: #f00;}
.center{ text-align: center; margin-top: 20px; font-family: "Microsoft Yahei";}
#box{ width: 700px; margin: 20px auto; border: 1px solid #ccc; background: #fff; font-size: 12px; position: relative; height: 120px;}
#left ,#right{ position: absolute; z-index: 2px; cursor: pointer; background: #eee; width: 20px; text-align: center; height: 100%; line-height: 2.4; }
#left{ left: 0;}
#right{ right: 0;}
.content{ margin-left: 20px; width: 660px; height: 120px; overflow: hidden; position: relative; background: #ccc;}
#wrap{ position: absolute; left: 0; width: 1500px;}
#wrap ul{ padding: 10px 0;}
#wrap li{ float: left; width: 120px; height: 100px; background: purple; margin-left: 10px;}
</style>
</head>
<body>
<h3 class="center">先向左滚动试试，然后向右滚动试试</h3>
<div id="box">
<a id="left" href="javascript:;">向左滚动</a>
<a id="right" href="javascript:;">右下滚动</a>
<div class="content">
<div id="wrap">
<ul class="clearfix">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
<li>10</li>
</ul>
</div>
</div>
</div>
<script>
// 封装getStyle函数
function getStyle(obj,attr){
return obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj,false)[attr];
}
window.onload = function(){
var oBox = document.getElementById(‘box‘);
// alert(getStyle(oBox,‘width‘)); // 700px
var oLeft = document.getElementById(‘left‘);
var oRight = document.getElementById(‘right‘);
var oWrap = document.getElementById(‘wrap‘);
var num = 0;
var timer = null;
oLeft.onmousedown = function(){
oWrap.timer = setInterval(function(){
var dis = parseInt(getStyle(oWrap,‘left‘)) - 5;
if(dis < -650){
dis = -650;
}
oWrap.style.left = dis + ‘px‘;
},30);
};
oLeft.onmouseup = function(){
clearInterval(oWrap.timer);
};
oRight.onmousedown = function(){
oWrap.timer = setInterval(function(){
var dis = parseInt(getStyle(oWrap,‘left‘)) + 5;
if(dis > 0){
dis = 0;
}
oWrap.style.left = dis + ‘px‘;
},30);
};
oRight.onmouseup = function(){
clearInterval(oWrap.timer);
};
};
/*function getStyle(obj ,attr){
return obj.currentStyle ? obj.currentStyle[attr] :getComputedStyle(obj ,false)[attr];
}
window.onload = function(){
var oBox = document.getElementById(‘box‘);
// alert(getStyle(oBox,‘width‘)) // 168px
var oUp = document.getElementById(‘up‘);
var oDown = document.getElementById(‘down‘);
var oWrap = document.getElementById(‘wrap‘);
var num = 0;
var timer = null;
// 鼠标按下向上链接，开启定时器
oUp.onmousedown = function(){
oWrap.timer = setInterval(function(){
// 先获取内容的top值[获取的是字符串，所以要用parseInt转换成数字]，然后让它每隔300ms减少5px使之向上运动
var dis = parseInt(getStyle(oWrap,‘top‘)) - 5;
// 这里的200是根据当前案例设置的，可以根据实际情况调整数值
if( dis < -220){
dis = -220;
}
oWrap.style.top = dis + ‘px‘;
},30);
};
// 鼠标移开向上链接，关闭定时器
oUp.onmouseup = function(){
clearInterval(oWrap.timer);
};
// 鼠标按下向下链接，开启定时器
oDown.onmousedown = function(){
oWrap.timer = setInterval(function(){
var dis = parseInt(getStyle(oWrap,‘top‘)) + 5;
if(dis > 0){
dis = 0;
}
oWrap.style.top = dis + ‘px‘;
},30);
};
// 鼠标移开向下链接，关闭定时器
oDown.onmouseup = function(){
clearInterval(oWrap.timer);
};
};*/
</script>
</body>
</html>
时间： 2024-12-09 12:58:53