JS submit the form to determine whether the user name and password are empty

<form action="" method="post" onsubmit="return check()"></form>

function check() {
    
    var usercode = $("#usercode").val();
    var password = $("#password").val();
    if (usercode == "" || password == "") {
    
        $("#message").text(" Account number or password cannot be empty ！");
        return false;
    }
    return true;
}