JavaScript控制鼠标滑轮事件

script language="JavaScript"
!--
//document.body.onmousewheel = function(){alert('你在滚，哈哈');}

function img_zoom(e, o){ //图片鼠标滚轮缩放
   var zoom = parseInt(o.style.zoom, 10) || 100;
   zoom += event.wheelDelta / 24;
   if (zoom 0) o.style.zoom = zoom + '%';
   return false;
}
//--
/script
img onmousewheel="return img_zoom(event,this)" src="bannner.jpg" width="500" height="500"