prefilled form and auto submit by fetch

var respUrl = 'https://docs.google.com/forms/d/e/{FormId}/formResponse?usp=pp_url';

respUrl += "&entry.{serial}=" + form.cn;

respUrl += "&entry.{serial}=" + ifpass;

respUrl += "&entry.{serial}=" + spendtime + "秒";

respUrl += "&submit=Submit";

UrlFetchApp.fetch(respUrl);