【神器】鼠标滚轮改变图片大小

<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>
<img src="logo2.png" alt="试试二维码进入-鼠标滚轮放大缩小" border="0" onmousewheel="return bbimg(this)" onload="javascript:if(this.width>screen.width-600) this.style.width=screen.width-600;">