title: string.replace(fromCharCode() , '') cannot replace characters
body: <p>When I parse the XML, it contains abnormal hex characters.
  So I tried to replace it with empty space. But it doesn't work at all.</p>
  
  <p>Original character : � </p>
  
  <pre><code>hex code : (253, 255)
  </code></pre>
  
  <p>code :</p>
  
  <pre><code>xmlData = String.replace(String.fromCharCode(253,255)," ");
  
  retrun xmlData;
  </code></pre>
  
  <p>I'd like to remove "ýÿ" characters from description.
  Is there anyone who have a trouble with replacing hex character to empty space?</p>
  
  <p>Based on the answers, I've modified the code as follows:</p>
  
  <pre><code>testData = String.fromCharCode(253,255);
  xmlData = xmlData.replace(String.fromCharCode(253,255), " "); 
  console.log(xmlData);
  </code></pre>
  
  <p>but it still shows '�' on the screen..</p>
  
  <p>Do you know why this still happens?</p>