通过鼠标滑轮控制图片大小

<img src="Image/image.bmp" border="1"
onmousewheel="return bigimg(this)" />

<script language="javascript">
function bigimg(O){
var zoom=parseInt(O.style.zoom,10)||100;
zoom+=event.wheelDelta/12;
if(zoom>0)O.style.zoom=zoom+'%';
return false;
}