Si contact form works brilliantly on my sites but I'd like to now extend it.
On another page I have a list of tasks and dates and a link button enabling a logged in user to volunteer for that task on that date by emailing the co-ordinator. Currently the link is http://...../?page_id=381 to the page containing [si-contact-form form='3'].
The source page is a home-written plugin so the php is readily modifiable.
On form 3 I have two additional fields set for date and a drop-down for task and I would like to pass the date and task from my page in the querystring (or otherwise) to populate these fields or at least pass a text message to pre-populate the message field with 'I will do x on y'. The logged-in user can then fill in the rest and send the form.
Can it be done and how please?