Dynamically Adding Text From Textboxes To A Single Textbox?

I need to create address fields as follows:

Address Line Fields: text should be input into these fields manually Primary Address field: text should be dynamically populated into this field based on the text manually input from the Address Line fields.

The below are the manual input fields:

Address Line 1: Text1
Address Line 2: Text2
Address Line 3: Text3
Address Line 4: Text4
Address Line 5: Text5
Address Line 6: Text6
City: Text7
State/County/Region: Text8
Zip Code/Post Code: Text9

The below is the Primary Address field which should look like this when the text has been input into the manual fields:

Primary Address: Text1, Text2, Text3, Text4, Text5, Text6, Text7, Text8, Text9

In other words, as I type the text in the Address Line fields, the text is added to the Primary Address field or textbox separated by commas automatically/dynamically.

Is this at all possible with javascript and is there some code that can do it?