function bigimg(obj){
var zoom = parseInt(obj.style.zoom,10)||100;
zoom += event.wheelDelta / 12;
if(zoom > 0 )
obj.style.zoom=zoom+'%';
return false;
}
使用方法
<img id="chgImg" src="'你的圖檔位址'" width="760" onmousewheel="return bigimg(this)" style="cursor:pointer" />