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<script type="text/javascript">
function bigimg(i){
var zoom = parseInt(i.style.zoom,10)||100;
zoom += event.wheelDelta / 12;
if(zoom > 0 )
i.style.zoom=zoom+‘%‘;
return false;
}
</script>
<center>
<a href="http://www.codefans.net">
<img src="http://www.codefans.net/jscss/demoimg/wall7.jpg" width="461" height="277" border="1" onmousewheel="return bigimg(this)">
</a>
</center>
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原文地址：http://www.cnblogs.com/muwei/p/4691610.html
