JavaScript实现垂直向上无缝滚动特效
一、循环向上滚动的文字，如上面的滚动效果
二、实现的思路
1、建立三个层dome、dome1、dome2
2、垂直滚动的文字在dome1上
3、通过层的滚动来实现文字滚动
三、源代码
2、垂直滚动的文字在dome1上
3、通过层的滚动来实现文字滚动
<html>
<head>
<title>循环向上滚动的文字</title>
<link href="css/scrollTop.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="domes">
<div class="dome_top">近7日畅销榜</div>
<div id="dome">
<div id="dome1">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><img src="images/scrollTop_1.jpg" alt="scroll" /></td>
<td><div class="title">社交疯狂项语</div>
<font class="price">￥57.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_2.jpg" alt="scroll" /> </td>
<td><div class="title">傲慢与偏见</div>
<font class="price">￥20.00</font> 折扣：25折</td>
</tr>
<tr>
<td><img src="images/scrollTop_3.jpg" alt="scroll" /></td>
<td><div class="title">玻璃鞋全集（50集34VCD）</div>
主演：金贤珠 金芝荷
<font class="price">￥300.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_4.jpg" alt="scroll" /></td>
<td><div class="title">澳大利亚：假日之旅</div>
<font class="price">￥53.00</font> 折扣：51折</td>
</tr>
<tr>
<td><img src="images/scrollTop_5.jpg" alt="scroll" /> </td>
<td><div class="title">浪漫地中海：假日之旅</div>
<font class="price">¥80.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_6.jpg" alt="scroll" /></td>
<td><div class="title">老人与海</div>
<font class="price">¥57.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_7.jpg" alt="scroll" /></td>
<td><div class="title">欧陆风情：假日之旅</div>
<font class="price">¥53.00</font> 折扣：52折</td>
</tr>
</table>
</div>
<div id="dome2"></div>
</div>
</div>
<script src="js/scrollTop.js" type="text/javascript"></script>
</body>
</html>
四、设置id为dome的层的div源代码
<head>
<title>循环向上滚动的文字</title>
<link href="css/scrollTop.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="domes">
<div class="dome_top">近7日畅销榜</div>
<div id="dome">
<div id="dome1">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td><img src="images/scrollTop_1.jpg" alt="scroll" /></td>
<td><div class="title">社交疯狂项语</div>
<font class="price">￥57.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_2.jpg" alt="scroll" /> </td>
<td><div class="title">傲慢与偏见</div>
<font class="price">￥20.00</font> 折扣：25折</td>
</tr>
<tr>
<td><img src="images/scrollTop_3.jpg" alt="scroll" /></td>
<td><div class="title">玻璃鞋全集（50集34VCD）</div>
主演：金贤珠 金芝荷
<font class="price">￥300.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_4.jpg" alt="scroll" /></td>
<td><div class="title">澳大利亚：假日之旅</div>
<font class="price">￥53.00</font> 折扣：51折</td>
</tr>
<tr>
<td><img src="images/scrollTop_5.jpg" alt="scroll" /> </td>
<td><div class="title">浪漫地中海：假日之旅</div>
<font class="price">¥80.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_6.jpg" alt="scroll" /></td>
<td><div class="title">老人与海</div>
<font class="price">¥57.00</font> 折扣：52折</td>
</tr>
<tr>
<td><img src="images/scrollTop_7.jpg" alt="scroll" /></td>
<td><div class="title">欧陆风情：假日之旅</div>
<font class="price">¥53.00</font> 折扣：52折</td>
</tr>
</table>
</div>
<div id="dome2"></div>
</div>
</div>
<script src="js/scrollTop.js" type="text/javascript"></script>
</body>
</html>
#dome{
overflow:hidden; /*溢出的部分不显示*/
height:180px;
padding:5px;
}
五、实现循环向上滚动的JavaScript代码 function $(element){
overflow:hidden; /*溢出的部分不显示*/
height:180px;
padding:5px;
}
return document.getElementById(element);
}
var dome=$("dome");
var dome1=$("dome1");
var dome2=$("dome2");
var speed=50; //设置向上滚动速度
dome2.innerHTML=dome1.innerHTML //复制dome1为dome2
function moveTop(){
if(dome2.offsetTop-dome.scrollTop<=0) //当滚动至dome1与dome2交界时
dome.scrollTop-=dome1.offsetHeight //dome跳到最顶端
else{
dome.scrollTop++
}
}
var MyMar=setInterval(moveTop,speed) //设置定时器
dome.onmouseover=function() {clearInterval(MyMar)} //鼠标移上时清除定时器达到滚动停止的目的
dome.onmouseout=function() {MyMar=setInterval(moveTop,speed)} //鼠标移开时重设定时器，继续滚动