不支持Firefox。
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><script language="javascript">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></head><body><p>将鼠标放在图片上，点击一下，然后滚动鼠标滚轮试试看</p><p><img border="0" src="../../static/img/test/award_1.png" onmousewheel="bbimg(this)"></p></body></body></html>
