鼠标滚轮缩放图片(js) function ZoomImg(o) { var zoom = parseInt(o.style.zoom, 10) || 100; zoom += event.wheelDelta / 12; if(zoom > 0) o.style.zoom = zoom + '%'; return false; } <img src="images/img.gif" onmousewheel="return ZoomImg(this)" width="200" height="200">