Dynamic populate radio button value

Hi,

Trying to make a form to have a radio button selected when the page is called with a certain parameter. I already tried several dynamically option and examples found here and on the internet but no luck untill now.

Situation:
I now have a website with several forms, these forms almost always start with a 'option 1' and 'option 2' choice. Depending on the choice a different part of the form is show.
Now I want to call a page and already set 'option 1' selected so that the user doesn't need to click that anymore.

So how do I achieve that? I already tried so much but I can't get the that radio button to be selected using ?my_parameter=val solution.

Hope someone can help me out!

Thnx
Sven

Ps: does it matter that I am using AJAX for the form.. and should I?

HI!

Thanks for you reply.

yes I have to 'allow dynamic population' field set. Parameter name = my_offerte

And in the form on my page I have even added the following code:

[gravityform id="4" name="PEF - Testament" title="false" description="false" ajax="true" field_values='my_offerte=checked']

You can see the form here http://bit.ly/19n3Irf
So i want to be able to call this url with a parameter and then have to top option selected automatically.

Hope you can help me out!

Thanks in advance!

Hi David,

Sorry for the late reasponse..

Err just to be clear I need to change it to my_offerte=input_9 ?

This is the input field I am trying to get selected:

<input name="input_9" type="radio" value="Ik wil direct online een offerte aanvragen" id="choice_9_0" tabindex="1" onclick="gf_apply_rules(4,[0,12,11,7,8,14,13,29,25,27,24,20,21,22,23]);">