Can you build a dynamic drop down field on a marketo form with a custom hidden field?

[justinedupreez]

My team is planning to experiment with our contact us form on our website. We are looking to dynamically update the drop-down options based on a person's account type. For example, if it's a person on our free plan we want the drop-down to talk about upgrades vs. support/talking to sales. 

I originally thought I could add our custom personal account type field has a hidden value on the form, but that doesn't seem to be working and what I'm seeing online is the order of events would be a field before the drop down that gets completed beforehand. Is there any other way I could accomplish this? 

[SanfordWhiteman · Accepted solution]

Think you mean “custom field”, not “custom activity”; I edited the title of your post accordingly.

There’s no reason you can’t use a hidden field to create a Visibility Rule. (I assume that’s what you already tried, though you weren’t clear.)

But for this to work, the field needs to be pre-filled, which means they need to either:

• have already visited your site and filled out a Marketo form^[1]
• have clicked a tracked link in a Marketo email to get to your page

[1] which also requires my custom pre-fill JS

[justinedupreez]

We decided to execute this in vwo, but I'm still interested in learning how to accomplish this in Marketo.

When you change it to a hidden field on the form you lose the Visibility Rule functionality, so how exactly would you accomplish that? Also can you link the custom pre-fill JS...

[SanfordWhiteman]

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When you change it to a hidden field on the form you lose the Visibility Rule functionality, so how exactly would you accomplish that?

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A Hidden field can still trigger Visibility Rules for other fields. It can’t be the target of Visibility Rules, of course, since it’s always hidden.

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Also can you link the custom pre-fill JS...

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The pre-fill JS is here.