https://linhadecomando.com/tag/onsubmit
Arquivos onSubmit - Linha de Comando
arquivosonsubmitlinhadecomando
https://www.linuxtopia.org/HowToGuides/HTML_tutorials/forms/_FORM_onSubmit.html
HTML Forms Tutorial - HTML onSubmit
HTML Forms Tutorial - HTML onSubmit
html formstutorialonsubmit