How to send an array from html web resource to a form text field.

Hi,

I am usin Microsoft Crm 2015. I wrote a html web resource. In this web resource using javascript, i want to sent a filled array to the parent form text field.

I tried  for a single value and it worked.For an array it did not work and i want to set an array to a text field:

var t="test";

window.parent.opener.Xrm.Page.getAttribute("new_testmultiline").setValue(t) ;

This code Works for a single value. I want to set to the multitext filed an array, seperated by commas.

How can I send the array and set it to multiline text? Can anyone help me please?