How to force a line break on a Javascript concatenated string?

I'm sending variables to a text box as a concatenated string so I can include multiple variables in on getElementById call.

I need to specify a line break so the address is formatted properly.

document.getElementById("address_box").value = 
(title + address + address2 + address3 + address4);

I've already tried \n after the line break and after the variable. and tried changing the concatenation operator to +=.

Fixed: This problem was resolved using;

document.getElementById("address_box").value = 
(title + "\n" + address + "\n" + address2 + "\n" +  address3 +  "\n" + address4);

and changing the textbox from 'input type' to 'textarea'

You can't have multiple lines in a text box, you need a textarea. Then it works with \n between the values.

document.getElementById("address_box").value = 
(title + "\n" + address + "\n" + address2 + "\n" + address3 + "\n" + address4);