<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> <style> #div1 {width:100px; height:100px; background:red; position:absolute; left:600px; top:50px;} #div2 {width:1px; height:300px; background:black; position:absolute; left:300px; top:0} #div3 {width:1px; height:300px; background:black; position:absolute; left:100px; top:0} </style> <script> var timer=null; function startMove(iTarget) { var oDiv=document.getElementById(‘div1‘); clearInterval(timer); timer=setInterval(function() { //var speed=(300-oDiv.offsetLeft)/10; //speed=Math.ceil(speed); //speed=speed>0?Math.ceil(speed):Math.floor(speed); var speed=0; if(oDiv.offsetLeft<iTarget) { speed=7; } else { speed=-7; } if(Math.abs(iTarget-oDiv.offsetLeft)<=7) { clearInterval(timer); oDiv.style.left=iTarget+‘px‘; } else { oDiv.style.left=oDiv.offsetLeft+speed+‘px‘; } //document.title=oDiv.offsetLeft ; }, 30); } </script> </head> <body> <input type="button" value="到100" onClick="startMove(100)"/> <input type="button" value="到300" onClick="startMove(300)"/> <div id="div1"> </div> <div id="div2"></div> <div id="div3"></div> </body> </html>
原文：https://www.cnblogs.com/bedfly/p/12297181.html