var submits = document.querySelectorAll("input[type=submit]");
var i = 0;
var f = function (e) {
if (e.target.classList.contains("is_submitting")) {
e.stopPropagation();
e.preventDefault();
}
else {
e.target.classList.add("is_submitting");
}
};
for (i = 0; i < submits.length; i++) {
submits[i].addEventListener("click", f);
}
