Edit in JSFiddle

Result
JavaScript
HTML

function run() {
    var c1 = document.getElementById('area').value;
    var d1 = document.getElementById('result');
    d1.innerHTML = getPostLink(c1);
}

/**
 * getPostLink
 * 
 * https://jsfiddle.net/
 * 
 * Get a direct link to your AudienceView posts by cleaning the URL of session info
 */

function getPostLink(textBlock) {
  this.textBlock = textBlock;
  var permalink  = textBlock.match(/permalink=\w+&/);
  var link = permalink[0].slice(10, -1);
  var base = "https://thegateway.org/Online/Article/";
  var url = base.concat(link);
  
  var anchor = textBlock.match(/\#.*/);
  url = url.concat(anchor);
  

  return url;
}

<!DOCTYPE html>
<body>
    <form id="form">
        <div>
            <textarea id="area" cols="50" rows="5"></textarea>
            <input type="button" value="Get Link" onclick="run()" />
            <br />
            <p id="result">Result</p>
        </div>
    </form>
</body>