<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <style type="text/css"> #div1 { width: 150px; height: 300px; background-color: green; position: absolute; left: -150px; } #div1 span { position: absolute; width: 20px; height: 60px; line-height: 20px; background-color: blue; right: -20px; top: 70px; } </style> <script type="text/javascript"> var timer; window.onload = function () { var oDiv = document.getElementById("div1"); oDiv.onmouseover = function () { StartMove(0); //StartMove(0,10); }; oDiv.onmouseout = function () { //StartMove(-150, -10); StartMove(-150); }; }; //z找出不同的部分,当做参数穿进去 function StartMove(target) { var speed = 0; var oDiv = document.getElementById("div1"); if (oDiv.offsetLeft > target) { speed = -10; } else { speed = 10; } clearInterval(timer); timer = setInterval(function () { if (oDiv.offsetLeft == target) { clearInterval(timer); } else { oDiv.style.left = oDiv.offsetLeft + speed + "px"; } }, 30); }; //function StartMove2() { // var oDiv = document.getElementById("div1"); // clearInterval(timer); // timer = setInterval(function () { // if (oDiv.offsetLeft ==-150) { // clearInterval(timer); // } else { // oDiv.style.left = oDiv.offsetLeft-10 + "px"; // } // }, 30); //}; </script> </head> <body> <div id="div1"> <span>分享到</span> </div> </body> </html>