Textbox required if another textbox is filled

Who can help? I need some changes in my form:

I have a dropdown menu. When choosing option 3, a new textbox (textbox 2) is occuring. Textbox 2 is required - but only when option 3 is chosen from dropdown. That is what need to be programmed.
Version used: 3.1 RC5.5
Please help! It is urgent.

Greetings,
Mathias

ps: email to: [email]mathias.rhode@gmail.com[/email]

Hi Mathias,

The "Creating Hideable Sections" document you just bought should tell you how to handle this OK.

Bob

Hey Bob,

thank you very much. It helped. There is just one question left.

When sending the form I get ja javacript popup with "errors have been found".

I searched - but where can I change the text?

I am looking forward to get help.

Greetings,
Mathias

Hi mathias,

It's in includes/js/validation.js around line 119

	if (!validForm) {
		alert("Errors have been found");
		location.hash = '#startOfForm';
	}

Bob