// Create a new <strong> element
  var s = document.createElement(“strong”);
  
  // Find the first paragraph
  var p = document.getElementsByTagName(“p”)[0];
  
  // Wrap the contents of the <p> in the <strong> element
  while ( p.firstChild ) {
      s.appendChild( p.firstChild );
  }
  
  // Put the <strong> element (containing the old <p> contents)
  // back into the <p> element
  p.appendChild( s );