How do I add a carriage return to the output ?

Question

I have a listBox with 15 values. That list box is connected to a textBox. The text box prints only the selected items from the listBox (thanks try67 for the help getting that set up). Now what I would like to do is have each of the items that are selected to appear seperately in lieu of having one lone continuous line. I think what I need to do is add a carriage returne (or two) between each item selected. Here is the code I have for custom calculation script
var v = this.getField("DiagnosisList").value;
if (typeof v=="string") event.value = v;
else event.value = v.join(", ");
I triend adding  /r/n   but I keep geting syntax error. Thanks for any assistane.

Answer 1

I appreciate you assistance, but this is not going to work. The narrative on the listBox for each item is so large, that it either gets chopped off or if I set the text size to auto it is too small. Is there a way to display the list items in a format that 'wraps'? If not then I will neet to set it up with check boxes now, but here is how the format should work:
() item one
() item two
() item three
then allow certain ones to be checked,
(x) itme one
() item two
(x) item three
and based on the ones checked, those are the only ones that print
Item one.
Item two.