js特效：通过鼠标中间滚轮来缩放图片大小

js特效：通过鼠标中间滚轮来缩放图片大小的代码

<script>
function bbimg(o){
var zoom=parseInt(o.style.zoom,10)||100;
zoom+=event.wheelDelta/12;
if(zoom>0) o.style.zoom=zoom+’%\';
return false;
}
</script>

<img onmousewheel=”return bbimg(this)” src=’http://www.dwww.cn/images/logo1.gif’ />