方法一：（不支持火狐）
<span style="font-size:14px;"><span style="font-size:14px;"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title><script type="text/javascript" src="jquery-1.6.2.js"></script><script type="text/javascript">$(function(){function zoomImg(o) {var zoom = parseInt(o.style.zoom, 10) || 100;zoom += event.wheelDelta / 2; //可适合修改if (zoom > 0)o.style.zoom = zoom + '%';}$(document).ready(function() {$("img").bind("mousewheel", function() {zoomImg(this);return false;});});})</script></head><body><center><img src="${ctx}/images/jiaju.png"/></center></body></html></span></span>
方法二：
<body><div><%--在网页中添加一个图片，待会就能用鼠标滚轮控制此图片的缩放--%><img id="myimage" src="${ctx}/images/jiaju.png" alt="my image" /><script type="text/javascript">//添加鼠标滚轮事件处理代码var myimage = document.getElementById("myimage");if (myimage.addEventListener) {// IE9, Chrome, Safari, Operamyimage.addEventListener("mousewheel", MouseWheelHandler, false);// Firefoxmyimage.addEventListener("DOMMouseScroll", MouseWheelHandler, false);}// IE 6/7/8else myimage.attachEvent("onmousewheel", MouseWheelHandler);//为了让不同浏览器都能支持的处理做法,我们将对Firefox的detail值取反然后返回1或者-1的其中一个function MouseWheelHandler(e) {// cross-browser wheel deltavar e = window.event || e; // old IE supportvar delta = Math.max(-1, Math.min(1, (e.wheelDelta || -e.detail)));//现在我们直接决定图片的大小范围。以下代码将图片的宽度范围设置在50-800个像素之间myimage.style.width = Math.max(50, Math.min(800, myimage.width + (30 * delta))) + "px";// 最后一点，我们在方法中返回false是为了终止标准的鼠标滚轮事件处理，以防它上下滑动网页return false;}</script></div></body>
