Use this function to set the value of a dropdown with auto complete

function setAutocompletCurrentValue(id, value) {
   $(id).val(value);
   var textToShow = $(id).find(":selected").text();
   $(id).parent().find("span").find("input").val(textToShow);
}

Called like this:

setAutocompletCurrentValue(dnn843GCSFieldName, 'test');

Notes:

The value you set it to must be a correct choice for the control from its dataset,

Not sure if the single quotes are needed or not.

To prevent a page refresh you have 3 options:

If you are working with a button.

1. return false  - on change/click  - which will stop execution of all actions on the button (as the on change/click javascript executes first)

2. return false; - but move it from the on change/click area to an Execute JavaScript action which you place as the last action on the submit button

3. Update Form AJAX as the last action on the button; this will submit and then refresh your form without refreshing the page.

To create a date 2 weeks in the future, simply use the following token: [DateTime:Relative(Add="2 Week")|yyyy-MM-dd] for the Initial Value setting.

If you are getting your date from SQL, for the "Initial" value ... what I have used successfully from SQL DateTime retreived fields is the following: [MyVariable:ISOAsUtc]

From Ben Santiardo

https://community.plantanapp.com/Forum/Question-Details?qid=1388

Using the javascript API you can open Action Form in popup by calling the next javascript method

dnnsf.api.actionForm.openPopupById('1234', {'param':'valueofparam','param2':'valueofparam2'},true)

Also works for simply initializing a form already on the page

dnnsf.api.actionForm.initForm('1234', {'param':'valueofparam','param2':’valueofparam2'})

It appears that [Department:Text] is a backend-only token, meaning it can't be used on the fronted; however, you can do something along the lines of: on the dropdown field under Bind Expressions, On Change/Click use the following code:

form.fields.mytextbox.value = form.fields.dropdown.selected.text;

this will give the text box the value of the dropdown.