间歇、无缝滚动效果（用gif录制的效果不是很好，有兴趣的可以down代码），具体内容如下
代码：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>无缝滚动</title> <style> *{margin:0;padding:0;} .box{width: 500px;height: 400px;margin:40px auto;background: #ccc;overflow: hidden;} .block{position: relative;width: 500px;height: 400px;overflow: hidden;} .item{height: 40px;background: red;color: #fff;line-height: 40px;text-align: center;} .item:nth-child(2n){background: #000} </style> <script> var scrollUp=(function(){ return function(json){ var objScroll = document.getElementById(json.id); objScroll.scrollTop = 0; objScroll.innerHTML += objScroll.innerHTML; if(json.on){ function scrollIng(){ if(objScroll.scrollTop >= objScroll.scrollHeight) { objScroll.scrollTop = 0; }else{ objScroll.scrollTop ++; } } var myScroll = setInterval(function(){scrollIng()},30); objScroll.onmouseover = function(){ clearInterval(myScroll); } objScroll.onmouseout = function(){ myScroll = setInterval(function(){scrollIng()},30); } }else{ var timer; function startScroll(){ timer=setInterval(function(){scrollUp()},30); objScroll.scrollTop++; } function scrollUp(){ if(objScroll.scrollTop % json.height==0){ clearInterval(timer); setTimeout(startScroll,2000); }else{ objScroll.scrollTop++; if(objScroll.scrollTop >= objScroll.scrollHeight/2){ objScroll.scrollTop =0; } } } setTimeout(startScroll,1000); } } })() window.onload=function(){ //on:间歇滚动/无缝滚动 height:间歇滚动的高度 scrollUp({on:true,id:'block'}); scrollUp({id:'block2',height:120}); } </script></head><body> <div class="box"> <div class="block" id="block"> <div class="item">1无缝滚动</div> <div class="item">2无缝滚动</div> <div class="item">3无缝滚动</div> <div class="item">4无缝滚动</div> <div class="item">5无缝滚动</div> <div class="item">6无缝滚动</div> <div class="item">7无缝滚动</div> <div class="item">8无缝滚动</div> <div class="item">9无缝滚动</div> <div class="item">10无缝滚动</div> <div class="item">11无缝滚动</div> <div class="item">12无缝滚动</div> <div class="item">13无缝滚动</div> <div class="item">14无缝滚动</div> <div class="item">15无缝滚动</div> </div> </div> <div class="box"> <div class="block" id="block2"> <div class="item">1间歇滚动</div> <div class="item">2间歇滚动</div> <div class="item">3间歇滚动</div> <div class="item">4间歇滚动</div> <div class="item">5间歇滚动</div> <div class="item">6间歇滚动</div> <div class="item">7间歇滚动</div> <div class="item">8间歇滚动</div> <div class="item">9间歇滚动</div> <div class="item">10间歇滚动</div> <div class="item">11间歇滚动</div> <div class="item">12间歇滚动</div> <div class="item">13间歇滚动</div> <div class="item">14间歇滚动</div> <div class="item">15间歇滚动</div> </div> </div></body></html>
注意点：
1.盒子块要css 溢出隐藏：overflow:hidden
2.有两个功能：间歇滚动/无缝滚动
3.先复制一块一模一样的代码，无缝滚动：执行定时器一直增加scrollTop值，当scrollTop值大于盒子高度，在设置scrollTop为0，重新来过。间歇滚动在此基础上加了setTimeout，间歇执行，在scrollTop到达指定的height停止
4.疑问：代码中setInterval(function(){scrollIng()},30);这样写才可以执行，setInterval('scrollIng()',30);这样就不行，有没有大神指导下，两者有啥区别？是啥机制？
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
