html鼠标滑动图片，可以放大图片或缩小

<img src="./images.png" alt="" width="60" height="60" onmousewheel="wheel(this);">


var w=300;
var h=200;
var n=0;
function wheel(obj){

    n=n+event.wheelDelta/1200;
    obj.width=w*(1+n);
    obj.height=h*(1+n);
}