Pop-up when code is not filled in

Hello,

When you want to post a message in the guestbook, you have to fill in the code (CAPTCHA).

If you don't, it says that one thing in the fields is wrong. Is it possible to make a pop-up that says "You forgot to fill in the code".

Just like when you forgot your name, it says: "You didn't fill in your name. Go back en change!".

No as then you would have to put the code in the Javascript which would make it readable by spammers.

Sorry ignore that I misread your question.

Off the top of my head open form.php in templates and find

document.book.gb_comment.value=trim(document.book.gb_comment.value);
if(document.book.gb_name.value == "") {
alert("You forgot to fill in the Name field. Please correct it and re-submit.");
document.book.gb_name.focus();
return false;
}

Replace with

document.book.gb_captcha.value=trim(document.book.gb_captcha.value);
document.book.gb_comment.value=trim(document.book.gb_comment.value);
if(document.book.gb_name.value == "") {
alert("You forgot to fill in the Name field. Please correct it and re-submit.");
document.book.gb_name.focus();
return false;
}
if(document.book.gb_captcha.value == "") {
alert("You forgot to fill in the Name field. Please correct it and re-submit.");
document.book.gb_captcha.focus();
return false;
}