<!doctype html> <html> <head> <meta http-equiv="content-type" charset="utf-8" /> <meta http-equiv="content-type" content="text/html" /> <title>demo</title> </head> <style type="text/css"> *{margin:0;padding:0;} ul,li,img{margin:0;padding:0;border:0;list-style-type:none;} #luanbo{border:1px solid red;overflow:hidden;height:24px;} #info li{height:24px;line-height:24px;} </style> <body> <div id="luanbo"> <ul id="info"> <li>aaaaaaaaaaa</li> <li>bbbbbbbbbbb</li> <li>ccccccccccc</li> <li>ddddddddddd</li> <li>eeeeeeeeeee</li> <li>fffffffffff</li> </ul> </div> <script type="text/javascript"> var odiv=document.getelementbyid("luanbo"); var oul=document.getelementbyid("info"); var oli=document.getelementbyid("info").getelementsbytagname("li"); var inow=0; function move(obj,tg){ //运动框架 clearinterval(dt); var dt=setinterval(function(){ var speed=2; if(tg-obj.scrolltop<speed){ tg=obj.scrolltop; clearinterval(dt); }else{ obj.scrolltop+=speed; } },30); } oul.innerhtml+=oul.innerhtml; function star(){ clearinterval(tm); var tm=setinterval(function(){ inow++; if(odiv.scrolltop>=(oli[0].offsetheight*oli.length)/2){ odiv.scrolltop=0; inow=0; }else{ var get=oli[0].offsetheight*inow; move(odiv,get); //运动框架 } },2000); } star(); </script> </body> </html>