Strip tags

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<p id="address">Address Line 1<br>
Address line 2<br>
City, State, Zip</p>
<a id="gMapLink" href="#"</a>

JavaScript

$(document).ready(function() {
  var address = $('#address').html(),
    link = 'http://maps.google.com/?q=',
    addressStriped = address.replace(/<br>/g, ',');
  $('#gMapLink').prop('href', link + addressStriped);
  console.log(addressStriped, $('a').prop('href'))
})