Hi !
Hopefully someone cann help me with a little bit of coding to change the default value of date fields when selecting an option from a dropdown field before.

I need a registration form for events, which are hold on a default day range but can be changed by the participants.

Dropdown field has 2 (or up to 4) options (event name)
next are date fields for "date from" and "date until"
date fields should show default values

I need something like

if dropdown_option="OPTION_1"
date1_from="03/17/14"
elseif dropdown_option2
date1_from="10/03/14"
endif

I guess this code (written in correct php) placed in the default value field of the date field will return the specified date.

Seems the key is to reference the dropdown field??

Can anybody help? - As You see I am by far not a coder !