要做一个http://qd.edushi.com/上面那个样的ZOOM大小放大缩小。百分提问

<img id=pic src="http://community.csdn.net/images/CSDN_logo.GIF" width=105 height=31 border=0 onmousewheel="return zoomimg(this)" alt="1.点击鼠标左键查看原图
2.鼠标滚轮放大/缩小图片">
<script>
var zoomp = 92;
function zoomimg(img)
{
  var zoom = parseInt(img.style.zoom,10) || 100;
  zoom += event.wheelDelta / 12;
  if (zoom>10) img.style.zoom = zoom + "%";
  return false;
}
</script>