复制代码 代码如下:
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<TITLE>onMouseWheel缩放图片效果－www.jb51.Net</TITLE>
<body>
<script>
function bbimg(o)
{
var zoom=parseInt(o.style.zoom, 10)||100;
zoom+=event.wheelDelta/12;
if (zoom>0) o.style.zoom=zoom+'%';
}
function addthis()
{
var e=window.event?window.event:e;
var srcE=e.srcElement?e.srcElement:e.target;
if(!srcE) return;
//author:reterry(dxy) www.jb51.net欢迎转载，转载时请写明出处。
if (String(srcE.tagName).toLowerCase()=='img'){
//alert('好');
bbimg(srcE)
}
}
function backthis(){
var e=window.event?window.event:e;
var srcE=e.srcElement?e.srcElement:e.target;
if(!srcE) return;
//author:reterry(dxy) www.jb51.net欢迎转载，转载时请写明出处。
if ((String(srcE.tagName).toLowerCase()=='img')&&(window.event.ctrlKey)){
//alert('好');
srcE.style.zoom='100%';
}}
document.onmousewheel=addthis;
document.onmouseout=backthis;
</script>
<A id=ImgSpan href="https://www.jb51.net/logos.gif" target=_blank><IMG src="/UploadFiles/2021-04-02/logos.gif"><br>鼠标滑轮滚动查看效果，Author:reterry(dxy) www.jb51.net欢迎转载，转载时请写明出处。<br>按住ctrl键然后鼠标从图片上移开，图片可恢复原始大小</body></html>
[Ctrl+A 全选 注:引入外部Js需再刷新一下页面才能执行]