本文實例為大家分享了js上下滑動效果的具體代碼，供大家參考，具體內容如下
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title> <style> .box{ width: 512px; height: 400px; margin:100px auto; overflow: hidden; position: relative; border: 1px solid red; } .box img{ position: absolute; left: 0; top: 0; } .box div{ width: 512px; height: 200px; position: absolute; left: 0; } .up{ top:0; } .down{ top: 200px; } </style> <script> window.onload = function(){ function $(id){ return document.getElementById(id);} var num = 0; var timer; var timer1; $("picup").onmouseover = function(){ //往下走 timer = setInterval(function(){ if(num>=0){ clearInterval(timer); }else{ num+=3; $("pic").style.top = num +"px"; } },10); } $("picup").onmouseleave = function(){ clearInterval(timer); } $("picdown").onmouseover = function(){ //往上走 timer1 = setInterval(function(){ if(num <= -1070){ clearInterval(timer1); }else{ num-=3; $("pic").style.top = num +"px"; } },30); } $("picdown").onmouseleave = function(){ clearInterval(timer1); } } </script></head><body> <div class="box"> <img src="mi.png" alt="" id="pic"> <div class="up" id="picup"></div> <div class="down" id="picdown"></div> </div></body></html> 以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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