var checkRegisterForm = function () {    const username = document.getElementById("username").value;    const usernameRegex = /^[\d\w]{3,10}$/;    const password = document.getElementById("password").value;    const confirmPassword = document.getElementById("password-2").value;    const passwordRegex = /^.{6,20}$/;    return usernameRegex.test(username) && passwordRegex.test(password) && password === confirmPassword;};