运行代码框
<script language="javascript"> var oTime; function chgSize(args) { var oImg = document.all['oImg']; oImg.style.zoom = parseInt(oImg.style.zoom) + (args ? +1 : -1) + '%'; oTime = window.setTimeout('chgSize(' + args + ')', 100); } document.onmouseup = function() { window.clearTimeout(oTime); } </script> <div style="height: 200px; overflow: auto;"> <img id="oImg" src="/Files/BeyondPic/2006-8/14/28youandi.jpg" style="zoom: 100%;"> </div> <button onmousedown="chgSize(true);" onmouseup="window.clearTimeout(oTime);">↑</button> <button onmousedown="chgSize(false);" onmouseup="window.clearTimeout(oTime);">↓</button>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]