// Find all <div> Elements in the current HTML document
  // and set their class to ‘hilite’
  var d = document.getElementsByTagName(“div”);
  for ( var i = 0; i < d.length; i++ ) {
      d[i].className = ‘hilite’;
  }
  
  // Go through all descendant elements of the element with 
  // an ID of body. Then find all elements that have one class 
  // equal to ‘hilite’. Then hide all those elements that match.
  var all = document.getElementById(“body”).getElementsByTagName(“*”);
  for ( var i = 0; i < all.length; i++ ) {
      if ( all[i].className == ‘hilite’ )
          all[i].style.display = ‘none’;
  }