如何排除不受欢迎的后代？

n

n

<div class="revealer">
  <div class="hotspot">
    <a class="handle" href="javascript:;">A</a>
    <div class="reveal">
      <p>Content A.</p>
    </div>
    <div class="reveal">
      <p>Content B.</p>
    </div>
  </div>
</div>

<div class="reveal"></div>

<div class="reveal"></div>

<div class="revealer">
  <div class="hotspot">
    <a class="handle" href="javascript:;">A</a>
    <div class="reveal">
      <p>Content A.</p>
    </div>
    <div class="reveal">

        <p>Content B.</p>

        <!-- nested revealer -->
        <div class="revealer">
          <div class="hotspot">
            <a class="handle" href="javascript:;">A</a>
            <div class="reveal">
              <p>Sub-content A.</p>
            </div>
            <div class="reveal">
              <p>Sub-content B.</p>
            </div>
          </div>
        </div>
        <script type="text/javascript"> // a setup script which instantiates a Module object for this revealer, which controls all revealing </script>

    </div>
  </div>
</div>
<script type="text/javascript"> // a setup script, which instantiates a Module object for this revealer, which controls all revealing </script>

    // grab all 'reveal' elements to show
    var reveals = yd.getElementsBy(function(el){
            if( yd.hasClass(el, REVEAL_CLASS) && pObj.isChild( el ) ){
                return true ;
            }
            return false;
    }, null, this.root() );


    // the test method above is "isChild( el )", the 'el' arg is a 'handle' inside a 'hotspot', so I have...

isChild: function( el )
{
    var ancestor = yd.getAncestorBy( el, function(nestedEl){
        return yd.hasClass(nestedEl, REVEALER_CLASS);
    });

    // ancestor is the immediate parent 'reveal' element
    var forefather = yd.getAncestorBy( ancestor, function(nestedEl){
        return yd.hasClass(nestedEl, REVEALER_CLASS);
    });

    // forefather is 
    if(forefather){
        // Yuck yuck yuck, get rid of this dependency on a custom className :(
        if(!yd.hasClass(this.getRoot(), 'revealer-nested') ){
            return false ;
        }
    }
    return true ;
},

revealer-nested

revealer