pointer-events
一直用disabled去阻止按鈕，結果一點反應也沒有
所以找到另一個方法是，pointer-events：none
https://developer.mozilla.org/en-US/docs/Web/CSS/pointer-events
$(".submit").css({
backgroundColor: "rgba(153, 153, 153, 0.2)",
cursor: "not-allowed"
}).prop({disabled: !0});
$("form").submit();
.notactive {
pointer-events: none;
cursor: default;
}